Sayyiduna Abdullah bin Arqam once went for Hajj. He himself used to lead his companions in prayer, give the adhan, and say the iqamah. One day, when he was about to say the iqamah, he said: "Let one of you step forward and lead the prayer, because I heard the Prophet (peace and blessings of Allah be upon him) say: If the prayer is established and any of you feels the need to go to the toilet, he should go to the toilet first."