Narrated Anas:

A young Jewish boy used to serve the Prophet and he became sick. So the Prophet went to visit him. He sat near his head and asked him to embrace Islam. The boy looked at his father, who was sitting there;
the latter told him to obey Abu-l-Qasim and the boy embraced Islam. The Prophet came out saying: "Praises be to Allah Who saved the boy from the Hell-fire."

حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ، حَدَّثَنَا حَمَّادٌ ـ وَهْوَ ابْنُ زَيْدٍ ـ عَنْ ثَابِتٍ، عَنْ أَنَسٍ ـ رضى الله عنه ـ قَالَ كَانَ غُلاَمٌ يَهُودِيٌّ يَخْدُمُ النَّبِيَّ ﷺ فَمَرِضَ، فَأَتَاهُ النَّبِيُّ ﷺ يَعُودُهُ، فَقَعَدَ عِنْدَ رَأْسِهِ فَقَالَ لَهُ " أَسْلِمْ ". فَنَظَرَ إِلَى أَبِيهِ وَهْوَ عِنْدَهُ فَقَالَ لَهُ أَطِعْ أَبَا الْقَاسِمِ ﷺ. فَأَسْلَمَ، فَخَرَجَ النَّبِيُّ ﷺ وَهْوَ يَقُولُ " الْحَمْدُ لِلَّهِ الَّذِي أَنْقَذَهُ مِنَ النَّارِ ".