Sahih al-Bukhari 3910
صحيح البخاري#3910Sahihحَدَّثَنَا قُتَيْبَةُ، عَنْ أَبِي أُسَامَةَ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ قَالَتْ أَوَّلُ مَوْلُودٍ وُلِدَ فِي الإِسْلاَمِ عَبْدُ اللَّهِ بْنُ الزُّبَيْرِ، أَتَوْا بِهِ النَّبِيَّ صلى الله عليه وسلم فَأَخَذَ النَّبِيُّ صلى الله عليه وسلم تَمْرَةً فَلاَكَهَا ثُمَّ أَدْخَلَهَا فِي فِيهِ، فَأَوَّلُ مَا دَخَلَ بَطْنَهُ رِيقُ النَّبِيِّ صلى الله عليه وسلم.
Narrated Aisha:The first child who was born in the Islamic Land (i.e. Medina) amongst the Emigrants, was `Abdullah bin Az-Zubair. They brought him to the Prophet. The Prophet (ﷺ) took a date, and after chewing it, put its juice in his mouth. So the first thing that went into the child's stomach, was the saliva of the Prophet
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 63:135