Allah commanded Ibraaheem (peace be upon him), after he had finished building the House, to proclaim to mankind the Hajj. Allah says (interpretation of the meaning): “And proclaim to mankind the Hajj (pilgrimage)” [al-Hajj 22:27]. Ibn Katheer said, commenting on this verse: Meaning, call out to mankind, inviting them to come on pilgrimage to the House which We instructed you to build. It is narrated that he said: O Lord, how can I convey to the people when my voice will not reach them? He said: Call, and it is Ours to convey it. So he stood at his Maqaam, or it was said on the stone, or on al-Safa, or on Abu Qubays (a mountain near the Ka’bah), and he said: O mankind! Your Lord has built a House, so come on pilgrimage to it. It was said that the mountains lowered themselves so that his voice could reach all corners of the earth, and those who were still in (their mothers’) wombs and (fathers’) loins heard, and everything that heard him of rocks, cities and trees responded, and those who Allah decreed would perform Hajj until the Day of Resurrection responded: Labbayk Allahumma Labbayk. This is what is indicated by the reports narrated from Ibn ‘Abbaas, Mujaahid, ‘Ikrimah, Sa’eed, Ibn Jubayr and others among the salaf. And Allah knows best. This was narrated by Ibn Jareer and Ibn Abi Haatim at length. End quote from Ibn Katheer (may Allah have mercy on him).
And Allah knows best the facts of the matter. As for the call, there is no doubt concerning it, because it is stated in the Holy Qur'aan.
And Allah is the source of strength; may Allah send blessings and peace upon our Prophet Muhammad and his family and Companions. End quote.
Standing Committee for Academic Research and Issuing Fatwas.
Shaykh ‘Abd al-‘Azeez ibn ‘Abd-Allaah ibn Baaz, Shaykh ‘Abd-Allaah ibn Ghadyaan, Shaykh ‘Abd-Allaah ibn Qa’ood