Abu Ya'la recorded this narration from Sayyiduna Anas (may Allah be pleased with him) about some of the Companions of the Prophet (peace and blessings be upon him): they would lay their sides down and sleep; some of them would then perform ablution again, and some would not perform ablution (again). Its narrators are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الطهارة / 1290