Visiting a mushrik (for illness)

Anas reported that a Jewish boy used to serve the Prophet, may Allah bless him and grant him peace. The boy became ill and the Prophet ﷺ went to visit him. He sat by his head and said, "Become a Muslim." The boy looked at his father who was also sitting by his head. His father said to him, "Obey Abu'l-Qasim (may Allah bless him and grant him peace)." So the boy became a Muslim. The Prophet ﷺ left saying, "Praise be to Allah who has saved him from the Fire!"

حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ، قَالَ: حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ، عَنْ ثَابِتٍ، عَنْ أَنَسٍ، أَنَّ غُلاَمًا مِنَ الْيَهُودِ كَانَ يَخْدُمُ النَّبِيَّ ﷺ فَمَرِضَ، فَأَتَاهُ النَّبِيُّ ﷺ يَعُودُهُ، فَقَعَدَ عِنْدَ رَأْسِهِ فَقَالَ: أَسْلِمْ، فَنَظَرَ إِلَى أَبِيهِ، وَهُوَ عِنْدَ رَأْسِهِ، فَقَالَ لَهُ: أَطِعْ أَبَا الْقَاسِمِ ﷺ، فَأَسْلَمَ، فَخَرَجَ النَّبِيُّ ﷺ وَهُوَ يَقُولُ: الْحَمْدُ لِلَّهِ الَّذِي أَنْقَذَهُ مِنَ النَّارِ.