Qatadah narrates from Sayyiduna Anas (may Allah be pleased with him) regarding this verse: "They used to sleep but little of the night" [Surah al-Dhariyat: 17], that they would pray between Maghrib and Isha. In the hadith of Yahya there is an addition: "Their sides forsake their beds" [Surah al-Sajdah: 16].
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4748