[Machine] Because he came from Hadhramaut and the Messenger of Allah ﷺ used him on Bahrain, then Umar also used him on Bahrain and died there, so Abu Huraira Al-Dawsi used him in his place. And it was only Al-Ala' bin Al-Hadhrami who died in Bahrain in the year twenty-one.  

لِأَنَّهُ أَتَى مِنْ حَضْرَمَوْتَ وَكَانَ رَسُولُ اللَّهِ ﷺ اسْتَعْمَلَهُ عَلَى الْبَحْرَيْنِ ثُمَّ إِنَّ عُمَرَ اسْتَعْمَلَهُ عَلَى الْبَحْرَيْنِ فَتُوُفِّيَ بِهَا فَاسْتَعْمَلَ مَكَانَهُ أَبَا هُرَيْرَةَ الدَّوْسِيَّ وَإِنَّمَا تُوُفِّيَ الْعَلَاءُ بْنُ الْحَضْرَمِيِّ بِالْبَحْرَيْنِ سَنَةَ إِحْدَى وَعِشْرِينَ»