Hadith 1236
Sayyiduna Imran bin Husain (may Allah be pleased with him) narrates that I asked the Messenger of Allah (peace and blessings of Allah be upon him) about a man praying while sitting, so the Messenger of Allah (peace and blessings of Allah be upon him) said: "Praying while standing is superior, and the reward of the one who prays while sitting is half of the reward of the one who prays while standing."