Sahih Muslim 5617

حَدَّثَنَا أَبُو كُرَيْبٍ مُحَمَّدُ بْنُ الْعَلَاءِ حَدَّثَنَا أَبُو أُسَامَةَ عَنْ هِشَامٍ عَنْ أَبِيهِ عَنْ أَسْمَاءَ أَنَّهَا حَمَلَتْ بِعَبْدِ اللَّهِ بْنِ الزُّبَيْرِ بِمَكَّةَ قَالَتْ فَخَرَجْتُ وَأَنَا مُتِمٌّ فَأَتَيْتُ الْمَدِينَةَ فَنَزَلْتُ بِقُبَاءٍ فَوَلَدْتُهُ بِقُبَاءٍ ثُمَّ أَتَيْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَوَضَعَهُ فِي حَجْرِهِ ثُمَّ دَعَا بِتَمْرَةٍ فَمَضَغَهَا ثُمَّ تَفَلَ فِي فِيهِ فَكَانَ أَوَّلَ شَيْءٍ دَخَلَ جَوْفَهُ رِيقُ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ثُمَّ حَنَّكَهُ بِالتَّمْرَةِ ثُمَّ دَعَا لَهُ وَبَرَّكَ عَلَيْهِ وَكَانَ أَوَّلَ مَوْلُودٍ وُلِدَ فِي الْإِسْلَامِ

Asma' reported that she had become pregnant at Mecca with Abdullah b. Zubair (in her womt) and she (further) said: I set out (for migration to Medina) as I was in the advanced stage of pregnancy. I came to Medina and got down at the place known as Quba' and gave birth to a child there. Then I came to Allah's Messenger (may peace he upon him). He placed him (the child) in his lap and then commanded for the dates to be brought. He chewed them and then put the saliva in his mouth. The first thing which went into his stomach was the saliva of Allah's Messenger ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ). He then rubbed his palate with dates and then invoked blessings for him and blessed him. He was the first child who was born in Islam (after Migration).