"I was thinking of forbidding Ghilah until I remembered that it is done by the Persians and Romans" -(one of the narrators) Ishaq said: "(They) do that -and it does not harm their children." (Using translation from Nasāʾī 3326)  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ «لَقَدْ هَمَمْتُ أَنْ أَنْهَى عَنِ الْغِيلَةِ حَتَّى ذَكَرْتُ أَنَّ فَارِسَ وَالرُّومَ تَصْنَعُهُ» وَقَالَ إِسْحَاقُ يَصْنَعُونَهُ فَلَا يَضُرُّ أَوْلَادَهُمْ  

"Why do you do that?" We said: "A man may have a wife, and he has intercourse with her, but he does not want her to get pregnant, or he may have a concubine, and he has intercourse with her, but he does not want her to get pregnant." He said: "It does not make any difference if you do that, for it is the matter of Al-Qadr." (Using translation from Nasāʾī 3327)   

ذُكِرَ ذَلِكَ عِنْدَ رَسُولِ اللهِ ﷺ قَالَ «وَمَا ذَاكُمْ» قُلْنَا الرَّجُلُ تَكُونُ لَهُ الْمَرْأَةُ تُرْضِعُ فَيُصِيبُ مِنْهَا فَيُصِيبُهَا وَيَكْرَهُ أَنْ تَحْمِلَ مِنْهُ وَتَكُونُ لَهُ الْجَارِيَةُ فَيُصِيبُ مِنْهَا وَيَكْرَهُ أَنْ تَحْمِلَ مِنْهُ قَالَ «لَا عَلَيْكُمْ أَنْ لَا تَفْعَلُوا فَإِنَّمَا هُوَ الْقَدَرُ»  

"My wife is breast-feeding and I do not want her to get pregnant." The Prophet said: "What has been decreed in the womb will come to be." (Using translation from Nasāʾī 3328)  

أَنَّ رَجُلًا سَأَلَ النَّبِيَّ ﷺ عَنِ الْعَزْلِ فَقَالَ إِنَّ امْرَأَتِي تُرْضِعُ وَأَنَا أَكْرَهُ أَنْ تَحْمِلَ فَقَالَ النَّبِيُّ ﷺ «إِنَّ مَا قُدِّرَ فِي الرَّحِمِ سَيَكُونُ»