عَنِ الْعَلَاءِ بْنِ الْحَضْرَمِيِّ رَضِيَ اللَّهُ عَنْهُ قَالَ: بَعَثَنِي رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهَ وَعَلَى آلِهِ وَصَحْبِهِ وَسَلَّمَ إِلَى الْبَحْرَيْنِ أَوْ أَهْلِ هَجَرَ شَكَّ أَبُو حَمْزَةَ قَالَ: كُنْتُ آتِي الْحَائِطَ، يَكُونُ بَيْنَ الْإِخْوَةِ فَيُسْلِمُ أَحَدُهُمْ فَآخُذُ مِنَ الْمُسْلِمِ الْعُشْرَ، وَمِنَ الْآخَرِ الْخَرَاجَ
Sayyiduna Alaa bin Hadrami (may Allah be pleased with him) says: The Messenger of Allah (peace and blessings be upon him) sent me towards Bahrain or Hajar. Whenever I would enter a garden that belonged to different brothers and one of them had become Muslim, I would take one-tenth (ushr) as zakat from the Muslim and collect kharaj from the others.