Mentioning When Ghusl (A Purifying Bath) Is Obligatory And When It Is Not - The Ghusl Of The Disbeliever when He Accepts Islam

It was narrated from Qais bin 'Asim that he accepted Islam, and the Prophet (ﷺ) commanded him to perform Ghusl with water and lotus leaves.

أَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ، قَالَ حَدَّثَنَا يَحْيَى، قَالَ حَدَّثَنَا سُفْيَانُ، عَنِ الأَغَرِّ، - وَهُوَ ابْنُ الصَّبَّاحِ - عَنْ خَلِيفَةَ بْنِ حُصَيْنٍ، عَنْ قَيْسِ بْنِ عَاصِمٍ، أَنَّهُ أَسْلَمَ فَأَمَرَهُ النَّبِيُّ صلى الله عليه وسلم أَنْ يَغْتَسِلَ بِمَاءٍ وَسِدْرٍ ‏.‏