Narrated `Abdullah bin `Amr bin Rabi`a:who was one of the leaders of Bani `Adi and his father participated in the battle of Badr in the company of the Prophet. `Umar appointed Qudama bin Maz'un as ruler of Bahrain, Qudama was one of the warriors of the battle of Badr and was the maternal uncle of `Abdullah bin `Umar and Hafsa.
حَدَّثَنَا أَبُو الْيَمَانِ، أَخْبَرَنَا شُعَيْبٌ، عَنِ الزُّهْرِيِّ، قَالَ أَخْبَرَنِي عَبْدُ اللَّهِ بْنُ عَامِرِ بْنِ رَبِيعَةَ، وَكَانَ، مِنْ أَكْبَرِ بَنِي عَدِيٍّ وَكَانَ أَبُوهُ شَهِدَ بَدْرًا مَعَ النَّبِيِّ صلى الله عليه وسلم أَنَّ عُمَرَ اسْتَعْمَلَ قُدَامَةَ بْنَ مَظْعُونٍ عَلَى الْبَحْرَيْنِ، وَكَانَ شَهِدَ بَدْرًا، وَهُوَ خَالُ عَبْدِ اللَّهِ بْنِ عُمَرَ وَحَفْصَةَ رضى الله عنهم.
Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi) • Hadith 62