The Albaani Site

لَيْلَةُ الْقَدْرِ لَيْلَةُ سَابِعَةٍ أَوْ تَاْسِعَةٍ وَعِشْرِيْنَ،
إِنَّ الْمَلَائِكَةَ تِلْكَ الْلَّيْلَةَ فِي الْأَرْضِ أَكْثَرُ مِنْ عَدَدِ الْحَصَى

From Abu Hurairah in marfoo’ form, “The Night of Decree [Lailatul-Qadr] is the twenty-seventh or twenty-ninth night. Indeed on that night the [number of] angels on earth is more than the number of pebbles.”

Silsilah | 2205 | Hasan