Zakaria bin Ishaq al-Makki زكريا بن إسحاق المكي · The Book on Zakat

the Messenger of Allah sent Mu'adh to Yemen and said to him: "You are going to a people from the People of the Book, so invite them to testify that none has the right to be worshipped but Allah, and that I am the Messenger of Allah. If they comply with that, then inform them that Allah has made five prayers obligatory upon them in a day and a night. If they comply with that, then inform then that Allah…

a man said: "O Messenger of Allah! My mother died, will it benefit her if I give charity on her behalf?" He said: 'Yes.' He said: 'I have a Makhraf, so bear witness that I have given it in charity on her behalf.'"