2. Al-Baqara (The Cow)

Surah: 2   Aya: 125

125. Wa-ith jaAAalna albayta mathabatan lilnnasi waamnan waittakhithoo min maqami ibraheema musallan waAAahidna ila ibraheema wa-ismaAAeela an tahhira baytiya liltta-ifeena waalAAakifeena waalrrukkaAAi alssujoodi
  

  Translation

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 Maqâm (place) of Ibrâhim (Abraham) [or the stone on which Ibrâhim (Abraham) <><> stood while he was building the Ka'bah] as a place of prayer (for some of your prayers, e.g. two Rak'at after the Tawâf of the Ka'bah at Makkah), and We commanded Ibrâhim (Abraham) and Ismâ'il (Ishmael) that they should purify My House (the Ka'bah at Makkah) for those who are circumambulating it, or staying (I'tikâf), or bowing or prostrating themselves (there, in prayer).