Sayyiduna Abdullah bin Mufaddal (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings be upon him) said: "The greatest thief among people is the one who steals from his prayer." It was asked: O Messenger of Allah! How does he steal from his prayer? He replied: "He does not complete its bowing (ruku') and prostration (sujud), and the most miserly person is the one who is miserly with greetings of peace (salam)."