Musannaf Ibn Abi Shayba 28:492

Mu'adh ibn Mu'adh narrated to us, he said: Sa'id ibn Abi 'Aruba narrated to us, from Qatada, from Anas, from Abu Talha, that the Messenger of Allah (may Allah bless him and grant him peace), when he overcame a people, he liked to stay in their territory for three [days].