When Zainab the daughter of the Messenger of Allah ﷺ died, he said to us: Wash her odd number of times, i. e. three or five times, and put camphor or something-like camphor at the fifth time, and after you have washed her inform me. So we informed him and he gave us his under-garment, saying:" Put it next her body."
لَمَّا مَاتَتْ زَيْنَبُ بِنْتُ رَسُولِ اللَّهِ ﷺ قَالَ لَنَا رَسُولُ اللَّهِ ﷺ اغْسِلْنَهَا وِتْرًا ثَلاَثًا أَوْ خَمْسًا وَاجْعَلْنَ فِي الْخَامِسَةِ كَافُورًا أَوْ شَيْئًا مِنْ كَافُورٍ فَإِذَا غَسَلْتُنَّهَا فَأَعْلِمْنَنِي قَالَتْ فَأَعْلَمْنَاهُ فَأَعْطَانَا حِقْوَهُ وَقَالَ أَشْعِرْنَهَا إِيَّاهُ