Regarding brothers who have been breastfed by the same mother, whether they are younger or older, does the prohibition of marriage extend to them or not?

Question:
May Allah reward you with good and do you good. Regarding brothers who have been breastfed by the same mother, whether they are younger or older, does the prohibition of marriage extend to them or not?

Answer:
Yes. If a woman breastfeeds a child within two years, or breastfeeds a girl or a boy within two years with five feedings, then this breastfed child becomes her son and the son of her husband. The relatives of the husband become relatives of the breastfed child, and the relatives of the woman become relatives of the breastfed child. This is the established rule.
Rather, four feedings make one a sibling, and five feedings make one a sibling. It is said that this applies within two years. In that case, he becomes her son and the son of the man to whom she is related by blood, whether by one year or by intercourse. The mahram (forbidden relatives) of the father to whom the milk is attributed, and the mahram of the nursing mother, all become mahram to this breastfed child at this level. There is no difference between the elder and the younger, or between those who share in the breastfeeding; there is no difference in that. Likewise, the wives of the man to whom the milk is attributed, and their children from other wives, and the children of the man to whom the milk is attributed from other wives, and the fact that we are siblings to this breastfed child, is based on the gathering of the saying of the Messenger of Allah (peace and blessings be upon him) .