Volume 9, Book 89, Number 271:
Narrated Abu Musa:
A man embraced Islam and then reverted back to Judaism. Mu’adh bin Jabal came and saw the
man with Abu Musa. Mu’adh asked, “What is wrong with this (man)?” Abu Musa replied, “He em –
braced Islam and then reverted back to Judaism.” Mu’adh said, “I will not sit down unless you kill
him (as it is) the verdict of Allah and His Apostle