Sayyiduna Abu Hurayrah (may Allah be pleased with him) relates that the Messenger of Allah (peace and blessings be upon him) said: "When the son of Adam recites a verse of prostration and prostrates, Satan withdraws weeping and says: 'Woe to me! Alas! The son of Adam was commanded to prostrate and he prostrated, so Paradise is for him; and I was commanded to prostrate and I refused, so now Hell is for me.'"
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3700