Each of them breastfed the child of the other; do any rulings result from that?

 

I hope that you can explain the ruling on breastfeeding (radaa’ah) in full, for example, I breastfed my brother-in-law’s son for a month, and my son was breastfed by my brother-in-law’s wife. I have a daughter and a son who are older than the child who was breastfed by my brother-in-law’s wife, and she also had two children before the child of hers whom I breastfed. 


I hope that you can describe the kind of breastfeeding that makes the child a mahram and the rulings that apply to the rest of the siblings? Thank you very much.

Praise be to Allaah.
 

 

Whoever is breastfed by a woman five times, before the age of
two years, becomes her child through breastfeeding and she becomes his
mother. Her husband (the “owner of the milk”) becomes a father to him
through breastfeeding, and everyone who was also breastfed by this woman
becomes his brother or sister through breastfeeding, and so on. 

That is because of the report narrated by Muslim (1425) from
‘Aa’ishah who said: “When the Qur’aan was first revealed, the number of
breast-feedings that would make a child a relative (mahram) was ten, then
this was abrogated and replaced with the number of five which is
well-known.” 

And al-Tirmidhi narrated that Umm Salamah said: The Messenger
of Allaah (peace and blessings of Allaah be upon him) said: “The only
breastfeeding that creates the relationship of mahram is that which fills
the stomach from the breast, before weaning.” Classed as saheeh by
al-Albaani in al-Irwa’, 2150. 

What is meant by “from the breast” means at the time of
breastfeeding. The Arabs say “Maata fulaan fi’l-thadiy (So and so
died at the time of breastfeeding, i.e, in infancy, before weaning).” This
is the view of al-Shawkaani. 

Al-Tirmidhi said: This is a saheeh hasan hadeeth, and the
view followed by the majority of scholars among the companions of the
Prophet (peace and blessings of Allaah be upon him) and others is that
breastfeeding does not make a child a mahram unless it is done before the
child reaches the age of two. Any breastfeeding that occurs after the age of
two does not make the child a mahram.” 

Al-Bukhaari (2645) narrated that Ibn ‘Abbaas (may Allaah be
pleased with him) said: The Prophet (peace and blessings of Allaah be
upon him) said concerning the daughter of Hamzah: “She is not permissible
for me (to marry), because what becomes mahram (forbidden for marriage)
through breastfeeding is that which become mahram through blood ties. And
she is the daughter of my brother through breastfeeding” 

The definition of breastfeeding: 

Ibn al-Qayyim (may Allaah have mercy on him) said: 

One breastfeeding (rad’ah) means when the child takes the
beast and starts suckling, and then lets it go without being made to do so.
That is one breastfeeding, because the Lawgiver referred to one
breastfeeding in general terms, so it is to be interpreted according to
custom, and this is the custom. If the child stops briefly in order to
breathe or to rest or because of some distraction, then quickly goes back to
the breast, this is regarded as one breastfeeding, just as when a person who
is eating pauses briefly then quickly goes back to eating, this is not
regarded as two meals, rather it is one. This is the view of al-Shaafa’i. 
And if the infant moves from one breast to the other, this is one
breastfeeding. See also question no. 2864 

Shaykh Ibn Baaz (may Allaah have mercy on him) said: 

If a woman breastfeeds a child for five well known
breastfeedings or more during the first two years, the infant becomes a
child for her and her husband who is the owner of the milk, and all that
woman’s children from the husband who is the owner of the milk or from other
husbands become siblings of this infant, and the children of the man who is
the owner of the milk, whether from the breastfeeding woman or from other
wives, become siblings of the infant. Her brothers become maternal aunts for
him, and the brothers of the husband, the owner of the milk, become paternal
uncles for him, and the father of the woman becomes a grandfather for the
child and the father of the husband, the owner of the milk, becomes a
grandfather to him and the husband’s mother becomes a grandmother to him,
because Allaah says concerning female mahrams in Soorat al-Nisa’
(interpretation of the meaning): 

“your foster mothers who gave you suck, your foster milk
suckling sisters”

[al-Nisa’ 4:23] 

 And the Prophet (peace and blessings of Allaah be upon
him) said: “What becomes mahram (forbidden for marriage) through
breastfeeding is that which become mahram through blood ties.” And he
(peace and blessings of Allaah be upon him) said: “There is no breastfeeding
except during the first two years.” And it was proven in Saheeh Muslim
that ‘Aa’ishah (may Allaah be pleased with her) said: “When the Qur’an was
first revealed, the number of breast-feedings that would make a child a
relative (mahram) was ten, then this was abrogated and replaced with the
number of five which is well-known. Then the Prophet (peace and
blessings of Allaah be upon him) passed away when that was the state of
affairs.” This version was narrated by al-Tirmidhi but it is also found in
Saheeh Muslim. 

From Fataawa Islamiyyah, 3/333 

In conclusion: 

If your son was breastfed five times in the first two years
by your brother-in-law’s wife, then he is a brother to all of her sons and
daughters. 

Similarly the son of this woman who was breastfed by you,
becomes a son to you and a brother to all your sons and daughters, whether
they are older or younger than the one who was breastfed, whether they were
already present or have not been born yet. 

Your sons – apart from the son who was breastfed by the wife
of his paternal uncle – may marry the daughters of their paternal uncle,
because they are not mahrams to one another. And your daughters may marry
the sons of their paternal uncle except the son who was breastfed by you,
because he is a brother to them, as explained above. 

And Allaah knows best.