Musannaf Ibn Abi Shayba 3:6298

Waki’ narrated to us, he said: Sufyan narrated to us, from ‘Asim, from Zirr, from ‘Abdullah, who said: "Whoever stands [in prayer] for the year will attain it." He said: And my father said: "‘Abdullah certainly knew that it is in the month of Ramadan, on the night of the twenty-seventh."