[Machine] When Ibrahim, the son of the Prophet ﷺ, was born from Mariyah, his wife, the Prophet ﷺ was almost inclined towards considering him as his own child until Jibril came to him and greeted him. Jibril said, "Peace be upon you, O father of Ibrahim." In this, there is evidence of the certainty of lineage for the offspring of the Ummah.
أَنَّهُ لَمَّا وُلِدَ إِبْرَاهِيمُ ابْنُ النَّبِيِّ ﷺ مِنْ مَارِيَةَ جَارِيَتِهِ كَادَ يَقَعُ فِي نَفْسِ النَّبِيِّ ﷺ مِنْهُ حَتَّى أَتَاهُ جِبْرِيلُ عَلَيْهِ السَّلَامُ فَقَالَ السَّلَامُ عَلَيْكَ أَبَا إِبْرَاهِيمَ وَفِي هَذَا إِنْ ثَبَتَ دَلَالَةٌ عَلَى ثُبُوتِ النَّسَبِ لِفِرَاشِ الْأَمَةِ