Musannaf Ibn Abi Shayba 28:551

Ishaq ibn Sulayman al-Razi narrated to us, from Abu Ja'far, from al-Rabi', from Abu al-'Aliyah, that Abu Bakr, when he would send an army to the people of apostasy, used to say: "Stay close by. If you hear the call [to prayer] until the sun rises, [then do not attack]; otherwise, raid them."