Sunan Abu Dawud
4110
Sahih+2

The tradition mentioned above has also been transmitted by al-Auza'i through a different chain of narrators. This version adds:He was told: Messenger of Allah, in that case he will of starvation. So he allowed him to visit (the cit) twice a week so that he might ask for food and go back

SahihAl-Albani
SahihMuhammad Muhyi Al-Din Abdul Hamid