"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."  

ذُكِرَ ذَلِكَ عِنْدَ رَسُولِ اللَّهِ ﷺ قَالَ وَمَا ذَاكُمْ قُلْنَا الرَّجُلُ تَكُونُ لَهُ الْمَرْأَةُ فَيُصِيبُهَا وَيَكْرَهُ الْحَمْلَ وَتَكُونُ لَهُ الأَمَةُ فَيُصِيبُ مِنْهَا وَيَكْرَهُ أَنْ تَحْمِلَ مِنْهُ قَالَ لاَ عَلَيْكُمْ أَنْ لاَ 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."  

أَنَّ رَجُلاً سَأَلَ رَسُولَ اللَّهِ ﷺ عَنِ الْعَزْلِ فَقَالَ إِنَّ امْرَأَتِي تُرْضِعُ وَأَنَا أَكْرَهُ أَنْ تَحْمِلَ فَقَالَ النَّبِيُّ ﷺ إِنَّ مَا قَدْ قُدِّرَ فِي الرَّحِمِ سَيَكُونُ