Yahya related to me from Malik from Nafi that Abdullah ibn Umar said, "There is no kinship by suckling except for a person who is nursed when he is small. There is no kinship by suckling over the age of two years."


وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ يَقُولُ لاَ رَضَاعَةَ إِلاَّ لِمَنْ أُرْضِعَ فِي الصِّغَرِ وَلاَ رَضَاعَةَ لِكَبِيرٍ ‏.‏
USC-MSA web (English) reference : Book 30, Hadith 6
Arabic reference : Book 30, Hadith 1280