Sayyiduna Hudhayfah bin Yaman (may Allah be pleased with him) says: I prayed with the Messenger of Allah (peace and blessings be upon him), and in bowing he would say "Subhana Rabbiyal 'Azim" and in prostration "Subhana Rabbiyal A'la". Also, when he would pass by a verse mentioning mercy, he would pause and ask for mercy, and when he would pass by a verse mentioning punishment, he would seek refuge from it.