Muwatta Malik 1283
موطأ مالك#1283SahihThese are the words of a Successor — the generation after the Companions — not of the Prophet ﷺ.
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، أَنَّهُ كَانَ يَقُولُ الرَّضَاعَةُ قَلِيلُهَا وَكَثِيرُهَا تُحَرِّمُ وَالرَّضَاعَةُ مِنْ قِبَلِ الرِّجَالِ تُحَرِّمُ . قَالَ يَحْيَى وَسَمِعْتُ مَالِكًا يَقُولُ الرَّضَاعَةُ قَلِيلُهَا وَكَثِيرُهَا إِذَا كَانَ فِي الْحَوْلَيْنِ تُحَرِّمُ فَأَمَّا مَا كَانَ بَعْدَ الْحَوْلَيْنِ فَإِنَّ قَلِيلَهُ وَكَثِيرَهُ لاَ يُحَرِّمُ شَيْئًا وَإِنَّمَا هُوَ بِمَنْزِلَةِ الطَّعَامِ .
Yahya related to me from Malik from Ibn Shihab that he said, "Suckling however little or much, makes haram. Kinship by suckling makes men mahram." Yahya said that he had heard Malik say, "Suckling, however little or much when it is in the first two years, makes haram. As for what is after the first two years, little or much, it does not make anything haram. It is like food
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 30:12