Visiting children who are ill

Usama ibn Zayd reported that a child of one of the daughters of the Messenger of Allah ﷺ was very ill. His mother sent word to the Prophet ﷺ to say that her child was dying. He told the messenger, "Go and tell her that to Allah belongs what He takes and what He gives. Everything is with Him until a stated term. She should be patient and leave him to Allah." The messenger went back and told her. She sent to him again to plead with him to come. The Prophet ﷺ got up with a group of his Companions, including Sa'd ibn 'Ubada. The Prophet ﷺ took the child and put him on his breast. The child was shaking like a leaf against his chest. The Messenger of Allah ﷺ wept and Sa'd said, "Do you weep, Messenger of Allah?" He replied, "I weep out of compassion for the child. Allah only shows mercy to those of His slaves who are merciful."

حَدَّثَنَا حَجَّاجٌ، قَالَ: حَدَّثَنَا حَمَّادٌ، عَنْ عَاصِمٍ الأَحْوَلِ، عَنْ أَبِي عُثْمَانَ النَّهْدِيِّ، عَنْ أُسَامَةَ بْنِ زَيْدٍ، أَنَّ صَبِيًّا لاَبْنَةِ رَسُولِ اللهِ ﷺ ثَقُلَ، فَبَعَثَتْ أُمُّهُ إِلَى النَّبِيِّ ﷺ، أَنَّ وَلَدِي فِي الْمَوْتِ، فَقَالَ لِلرَّسُولِ: اذْهَبْ فَقُلْ لَهَا: إِنَّ لِلَّهِ مَا أَخَذَ، وَلَهُ مَا أَعْطَى، وَكُلُّ شَيْءٍ عِنْدَهُ إِلَى أَجْلٍ مُسَمًّى، فَلْتَصْبِرْ وَلْتَحْتَسِبْ، فَرَجَعَ الرَّسُولُ فَأَخْبَرَهَا، فَبَعَثَتْ إِلَيْهِ تُقْسِمُ عَلَيْهِ لَمَا جَاءَ، فَقَامَ النَّبِيُّ ﷺ فِي نَفَرٍ مِنْ أَصْحَابِهِ، مِنْهُمْ: سَعْدُ بْنُ عُبَادَةَ، فَأَخَذَ النَّبِيُّ ﷺ الصَّبِيَّ فَوَضَعَهُ بَيْنَ ثَنْدُوَتَيْهِ، وَلِصَدْرِهِ قَعْقَعَةٌ كَقَعْقَعَةِ الشَّنَّةِ، فَدَمَعَتْ عَيْنَا رَسُولِ اللهِ ﷺ، فَقَالَ سَعْدٌ: أَتَبْكِي وَأَنْتَ رَسُولُ اللهِ؟ فَقَالَ: إِنَّمَا أَبْكِي رَحْمَةً لَهَا، إِنَّ اللَّهَ لاَ يَرْحَمُ مِنْ عِبَادِهِ إِلاَّ الرُّحَمَاءَ.