“The pilgrimage to Mecca, known as the Hajj, is a religious obligation that every orthodox Muslim fulfills, if able, at least once in his or her lifetime.
The Holy Quran says it, "Pilgrimage to the House [of God built by the prophet Abraham] is a duty men owe to God; those who are able, make the journey." (3:97)

Allah said: "And proclaim the pilgrimage among men; they will come to you on foot and upon each lean camel, they will come from every deep ravine" (22:27).

Every one of the thousands at the airport, about to leave for Jeddah, was dressed this way. You could be a king or a peasant and no one would know. Some powerful personages, who were discreetly pointed out to me, had on the same thing I had on. Once thus dressed, we all had begun intermittently calling out "Labbayka! (Allahumma) Labbayka!" (Here I come, O Lord!) Packed in the plane were white, black, brown, red, and yellow people, blue eyes and blond hair, and my kinky red hair -- all together, brothers! All honoring the same God, all in turn giving equal honor to each other….

That is when I first began to reappraise the "white man." It was when I first began to perceive that "white man," as commonly used, means complexion only secondarily; primarily it described attitudes and actions. In America,"white man" meant specific attitudes and actions toward the black man, and toward all other non-white men. But in the Muslim world, I had seen that men with white complexions were more genuinely brotherly than anyone else had ever been. That morning was the start of a radical alteration in my whole outlook about "white" men.”

Text of a letter written following his Hajj (1964)