وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، أَنَّ رَجُلاً، سَأَلَ أَبَا مُوسَى الأَشْعَرِيَّ فَقَالَ إِنِّي مَصِصْتُ عَنِ امْرَأَتِي، مِنْ ثَدْيِهَا لَبَنًا فَذَهَبَ فِي بَطْنِي فَقَالَ أَبُو مُوسَى لاَ أُرَاهَا إِلاَّ قَدْ حَرُمَتْ عَلَيْكَ ‏.‏ فَقَالَ عَبْدُ اللَّهِ بْنُ مَسْعُودٍ انْظُرْ مَاذَا تُفْتِي بِهِ الرَّجُلَ فَقَالَ أَبُو مُوسَى فَمَاذَا تَقُولُ أَنْتَ فَقَالَ عَبْدُ اللَّهِ بْنُ مَسْعُودٍ لاَ رَضَاعَةَ إِلاَّ مَا كَانَ فِي الْحَوْلَيْنِ ‏.‏ فَقَالَ أَبُو مُوسَى لاَ تَسْأَلُونِي عَنْ شَىْءٍ مَا كَانَ هَذَا الْحَبْرُ بَيْنَ أَظْهُرِكُمْ ‏.‏

Yahya related to me from Malik from Yahya ibn Said that a mansaid to Abu Musa al-Ashari, "I drank some milk from my wife's breastsand it went into my stomach." Abu Musa said, "I can only but thinkthat she is haram for you." Abdullah ibn Masud said, "Look at whatopinion you are giving the man." Abu Musa said, "Then what do yousay?" Abdullah ibn Masud said, "There is only kinship by suckling inthe first two years." Abu Musa said, "Do not ask me aboutanything while this learned man is among you." Translation Not Available

Book Ref: Muwatta Imam Malik Book 30 Hadith 1289
Web Ref:  Muwatta Imam Malik Book 30 Hadith 14