عَنْ أَبِي هُرَيْرَةِ رَضِيَ اللَّهُ عَنْهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ فِي لَيْلَةِ الْقَدْرِ: ((إِنَّهَا لَيْلَةُ سَابِعَةٍ أَوْ تَاسِعَةٍ وَعِشْرِينَ، إِنَّ الْمَلَائِكَةَ تِلْكَ اللَّيْلَةَ فِي الْأَرْضِ أَكْثَرُ مِنْ عَدَدِ الْحَصَى))
It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him and his family, said regarding the Night of Qadr: It occurs on the twenty-seventh or twenty-ninth night; on this night, more angels descend to the earth than the number of pebbles.