Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrates that the Messenger of Allah (peace and blessings be upon him) lifted the curtain of his blessed chamber while the people were praying behind Sayyiduna Abu Bakr (may Allah be pleased with him). So the Prophet (peace and blessings be upon him) said: "As for the prostrations, make supplication therein with great effort and striving, for it is more likely that your supplications will be accepted."