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 would say "Subhana Rabbiyal Azeem" in his bowing (ruku) and "Subhana Rabbiyal A'la" in his prostration (sajda). Whenever he passed by a verse mentioning mercy, he would pause and supplicate, and whenever he passed by a verse mentioning punishment, he would pause and seek refuge from it.