سورة Al-Baqarah ( The Cow ) - الآية 125

And (remember) when We made the House (the Ka`bah at Makkah) a place of resort for mankind and a place of safety. And take you (people) the Maqam (place) of Ibrahim as a place of prayer. And We commanded Ibrahim (Abraham) and Isma`il (Ishmael) that they should purify My House (the Ka`bah at Makkah) for those who are circumambulating it, or staying (I`tikaf), or bowing or prostrating themselves (there, in prayer).