Sahih Muslim Book - 16, Hadith - 3565

حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ سَعِيدٍ وَمُحَمَّدُ بْنُ أَبِى عُمَرَ قَالاَ حَدَّثَنَا الْمُقْرِئُ حَدَّثَنَا سَعِيدُ بْنُ أَبِى أَيُّوبَ حَدَّثَنِى أَبُو الأَسْوَدِ عَنْ عُرْوَةَ عَنْ عَائِشَةَ عَنْ جُدَامَةَ بِنْتِ وَهْبٍ أُخْتِ عُكَّاشَةَ قَالَتْ حَضَرْتُ رَسُولَ اللَّهِ -صلى الله عليه وسلم- فِى أُنَاسٍ وَهُوَ يَقُولُ « لَقَدْ هَمَمْتُ أَنْ أَنْهَى عَنِ الْغِيلَةِ فَنَظَرْتُ فِى الرُّومِ وَفَارِسَ فَإِذَا هُمْ يُغِيلُونَ أَوْلاَدَهُمْ فَلاَ يَضُرُّ أَوْلاَدَهُمْ ذَلِكَ شَيْئًا ». ثُمَّ سَأَلُوهُ عَنِ الْعَزْلِ فَقَالَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- « ذَلِكَ الْوَأْدُ الْخَفِىُّ ». زَادَ عُبَيْدُ اللَّهِ فِى حَدِيثِهِ عَنِ الْمُقْرِئِ وَهْىَ (وَإِذَا الْمَوْءُودَةُ سُئِلَتْ)

It was narrated from 'Aishah that Judamah bint Wahb, the sister of 'Ukashah, said: "I came to the Messenger of Allah (s.a.w) along with some other people and he was saying: 'I was thinking of forbidding intercourse with a breastfeeding woman, then I looked at the Romans and Persians; they have intercourse with their wives during the breastfeeding period and their children are not harmed by that at all.' Then they asked him about 'Azl and the Messenger of Allah (s.a.w) said: 'It is a hidden form of burying alive."' Ubaidullah added in his Hadith from Al-Muqri': This is a reference to (the verse): "And when the female (infant) buried alive is questioned."