Yahya related to me from Malik from Nuaym ibn Abdullah al-Mujmirthat he heard Abu Hurayra say, "If any one of you prays and then sitsdown in the spot where he has prayed, the angels ask blessings on himsaying, 'Allah, forgive him. Allah, have mercy on him.' And if hemoves from the spot where he has prayed and sits elsewhere in themosque waiting for the prayer, he remains in prayer until he prays."
USC-MSA web (English) reference: Book 9, Hadith 57
Arabic reference: Book 9, Hadith 388