Imām Bukhārī narrates: Muslim ibn Ibrāhīm narrated to us, he said: Hishām narrated to us, from Yahyā, from Abī Salamah, he said: I asked Abū Sa'īd al-Khudrī, may Allāh be pleased with him (Have you heard the Prophet ﷺ mention Lailat al-Qadr?), so he said:

Clouds came and it began to rain, until the roof of the mosque began to leak, and it was made of date-palm beams. Then the iqāmah for prayer was given, and then I saw the Messenger of Allāh ﷺ prostrating in water and mud, until I saw the mark of mud upon his face.