A simiar tradition from the Prophet(ﷺ) has also been transmitted by Mu’adh through a different chain of narrators.
Sunan Abi Dawud Book 20, Hadith 112
← Previous Hadith When the Prophet (ﷺ) sent him to the Yemen, he ordered to take from everyone who had reached puberty one dinar or its equivalent in Mu'afiri garment of Yemen origin.

Sunan Abi Dawud Book 20, Hadith 111 Next Hadith → ‘Ali said “If I survive for the Christians of Banu Taghlib I shall kill fighters and captivate children for I had written a document between them and the Prophet(ﷺ) to the effect that they would not make their children Christian.

Abu Dawud said “This is rejected (munkar) tradition and it has reached me from Ahmad (bin Hanbal) that he used to reject this tradition seriously.

Abu ‘Ali said “Abu Dawud did not present this (tradition) in this second reading.”

Sunan Abi Dawud Book 20, Hadith 113