Salim narrated from his father (Sayyiduna Abdullah bin Umar, may Allah be pleased with them both) that I prayed with the Messenger of Allah (peace be upon him), Abu Bakr, and Umar (may Allah be pleased with them both) at Mina (the Zuhr and Asr prayers shortened) two rak‘ahs each. I also prayed two rak‘ahs with Sayyiduna Uthman (may Allah be pleased with him) at the beginning of his caliphate, but later he started offering the full prayer.