Ibn Abi Zabyan narrates from his father that Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said: When Ibrahim (peace be upon him) finished building the House, he said: "O my Lord! I have finished." Allah, the Lord of Might, said: "Proclaim the Hajj among the people." He said: "O my Lord! My voice will not reach." Allah Almighty said: "You proclaim, and I will make it reach." He said: "O my Lord! What shall I say?" Allah Almighty said: "Say: O people! Allah has made the Hajj of the House obligatory upon you." Those who dwell between the heavens and the earth heard his voice. Do you not see that people come from the farthest ends of the earth reciting the talbiyah?
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9833