Musannaf Ibn Abi Shayba 1:2057

Abu Bakr narrated to us, he said: Yazid bin Harun narrated to us, he said: Hammad bin Salamah narrated to us, from Qays bin Sa'd, from 'Ata', regarding the one who forgets rinsing the mouth and sniffing water into the nose during ablution: He said: He should rinse his mouth and sniff water into his nose, and repeat the prayer.