Sayyiduna Nu'aym bin al-Nahham (may Allah be pleased with him) said: I was with my wife under her wrap on a cold morning when the caller of the Messenger of Allah (peace and blessings be upon him) called for the morning prayer. When I heard it, I said: If only the Messenger of Allah (peace and blessings be upon him) would say: "And whoever stays sitting, there is no blame on him." When he said 'As-salatu khayrun minan-nawm' (Prayer is better than sleep), he said: "And whoever stays sitting, there is no blame (on him)."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 1864