Musannaf Ibn Abi Shaybah 16408 — Where one stands on Safa

When Sayyiduna Ibn Umar (may Allah be pleased with them both) climbed Mount Safa, he would face the House, say the takbir three times, and recite this supplication: 'La ilaha illallahu wahdahu la sharika lahu, lahul-mulku wa lahul-hamdu wa huwa 'ala kulli shay'in qadir' (There is no god but Allah alone, He has no partner; His is the dominion and His is the praise, and He has power over all things). He would raise his voice while reciting it, and after that he would supplicate at length.