Abu Musa Ashari reported,

Abu Musa reported, "I came to the Prophet ﷺ accompanied by two men from the Ashari tribe, one on my right and the other on my left, while the Messenger of Allah ﷺ was using a tooth-stick. Both of them requested an appointment to a position while the Prophet was still using the tooth-stick.He asked, "What do you say, Abu Musa?" or "Abdullah bin Qays?"I replied, "By the One who sent you with the truth, they did not inform me of what was in their hearts, and I had no idea they were seeking an appointment."It is as though I can still see his tooth-stick beneath his lip, which had drawn back. He said, "We will never," or "We do not appoint to our work anyone who seeks it. But you go, Abu Musa," or "Abdullah bin Qays."So he sent him to Yemen, then sent Muaz bin Jabal after him. When Muaz arrived to him, Abu Musa said, "Dismount," and laid out a cushion for him. There was a man bound in fetters beside him.Muaz asked, "Who is this?"Abu Musa replied, "This man was a Jew, then he embraced Islam, then he reverted to his former evil religion and became a Jew again."Muaz said, "I will not sit down until he is killed. This is the judgment of Allah and His Messenger."Abu Musa said, "Sit down, of course."Muaz repeated, "I will not sit down until he is killed. This is the judgment of Allah and His Messenger," three times.So Abu Musa ordered that he be executed, and he was killed. Then the two of them discussed standing in prayer at night, and one of them, Muaz, said, "As for me, I sleep and I rise, and I hope for the same reward in my sleeping as I hope for in my standing."

عن أبي موسى قال

أقبلت إلى النبي ومعي رجلان من الأشعريين، أحدهما عن يميني، والآخر عن يساري، ورسول الله ﷺ يستاك فكلاهما سأل العمل والنبي يستاك، فقال: ما تقول: يا أبا موسى أو يا عبد الله بن قيس؟ فقلت: والذي بعثك بالحق ما أطلعاني على ما في أنفسهما، وما شعرت أنهما يطلبان العمل. وكأني أنظر إلى سواكه تحت شفته وقد قلصت، فقال: لن -أو- لا نستعمل على عملنا من أراده، ولكن اذهب أنت يا أبا موسى أو يا عبد الله بن قيس فبعثه على اليمن، ثم أتبعه معاذ بن جبل، فلما قدم عليه قال: انزل، وألقى له وسادة، وإذا رجل عنده موثق قال: ما هذا؟ قال: هذا كان يهوديا فأسلم ثم راجع دينه دين السوء فتهود، قال: لا أجلس حتى يقتل قضاء الله ورسوله، فقال: اجلس، نعم، قال: لا أجلس حتى يقتل، قضاء الله ورسوله ثلاث مرات، فأمر به، فقتل. ثم تذاكرا القيام من الليل فقال أحدهما -معاذ- أما أنا فأنام وأقوم، وأرجو في نومتي ما أرجو في قومتي.