It is narrated from Hazrat Hudhaifa (may Allah be pleased with him) that once I prayed with the Noble Prophet (peace and blessings be upon him). The Noble Prophet (peace and blessings be upon him) would say "Subhana Rabbiyal Azeem" in his bowing (ruku) and "Subhana Rabbiyal A'la" in his prostration (sajda), and whenever he passed by a verse of mercy, he would pause and supplicate, and whenever he passed by a verse of punishment, he would pause and seek refuge from it.