مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2224
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn 'Abbas (رضي الله عنه) that he said: On the day of al-Khandaq, the Muslims killed a mushrik man and the mushrikeen offered money for his body. But the Messenger of Allah (ﷺ) said, “Give their body back to them, for it is an evil body and an evil ransom." And he did not accept anything from them.
Musnad Ahmad 2230lts isnad is da'eef]