It was narrated from Abu Burdah bin Abi Musa Al-Ash'ari, from his father:
"That the Prophet (ﷺ) sent him to Yemen, then he sent Mu'adh bin Jabal after that. When he arrived he said: 'O people, I am the envoy of the Messenger of Allah (ﷺ) to you.' Abu Musa gave him a cushion to sit down, then a man was brought who had been a Jew, then he became a Muslim, then he reverted to Kufr. Mu'adh said: 'I will not sit down until he is killed; this is the decree of Allah and His Messenger,' (saying it) three times. When he was killed, he sat down."
Reference: Sunan an-Nasa'i 4066 In-book : Book 37, Hadith 101 English translation : Vol. 5, Book 37, Hadith 4071
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