Musannaf Ibn Abi Shayba 37:445

Waki’ narrated to us, from Sharik, from al-‘Abbas ibn Dharih, from al-Sha’bi, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Among the signs of the Hour is that the crescent moon will be seen as large, so it will be said: 'It is two nights old.'"