A man embraced Islam and then reverted back to Judaism. Muʿadh bin Jabal came and saw the man with Abu Musa. Muʿadh asked, "What is wrong with this (man)?" Abu Musa replied, "He embraced Islam and then reverted back to Judaism." Muʿadh said, "I will not sit down unless you kill him (as it is) the verdict of Allah and His Apostle.
لاَ أَجْلِسُ حَتَّى أَقْتُلَهُ قَضَاءُ اللَّهِ وَرَسُولِهِ ﷺ