It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "Prostration is upon seven limbs: the two hands, the two feet, the two knees, and the forehead; and raising the hands is: when you see the Ka'bah, upon Safa and Marwah, at Arafah, at Muzdalifah, at the stoning of the Jamarat, and when the prayer is established."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12230