What is the ruling on taking the deposit if the tenant returns the apartment?

The questioner : He says: I have a house and I rented out an apartment from it. I took a deposit of seven hundred riyals. The office came and after a month the office was lost, and he said, “I do not want the apartment; give me my deposit.” So I did not give him the deposit. Is it permissible for me to take the deposit, knowing that I do not like it there, if I wanted to return it to him?

The Shaykh : If you want to be cautious for yourself and take from this deposit the amount of the rent for the month he missed, there is no blame on you, and you give the rest in charity. This is better, especially if he delayed the rental for an excuse.