That same year Abraham made the pilgrimage, and he confided the care of the temple to Ishmael, his son, and he said to him, “This land belongs to thee and to thy children till the Judgment Day.” Then Abraham, turning him about, went at God’s command to the top of a high mountain, and cried, “O men, God has built you a house, and He calls you to visit it.” And all men and women, and the children yet unborn, answered from every quarter of the world, “We will visit it.” Then Abraham returned into Syria.[356] Now the well of Zemzem was formed when Hagar and Ishmael were in the desert. The angel Gabriel trod in the ground and the water bubbled up. At first it was sweet as honey, and as nourishing as milk. This well is one of the wonders of Mecca. We shall relate more of it presently. And the stone that was white and shining, but now is black, that stone was an angel who wept over the sins of men till he has grown dark; that also is one of the wonders of Mecca. Whilst Ishmael was engaged one day in building the Kaaba, there came to him Alexander the Two-horned, and asked him what he was doing. Then Abraham answered, “We build a temple to the only God in whom we believe.” And Alexander knew that he was a prophet of God; and he went on foot seven times round the temple. About this Alexander, authorities differ. Some say that he was a Greek, and that he was lord of the whole earth as Nimrod was before him, and as Solomon was after him. Alexander was lord of light and darkness; when he went forth with his hosts, he had light before him, and behind him was darkness: thus he could overtake his enemies, but could not be overtaken by them. He had also two banners, one white and the other black, and when he unfurled the white one, it was instantly broad day; and when he unfurled the black one, it was instantly midnight. Thus he could have day in the darkest night, and night in the brightest day. He was also unconquerable; for he could, at will, make his army invisible, and fall upon his enemies and destroy them, without their being able to see who were opposed to them. He went through the whole world in quest of the Fountain of Immortality, of which, as he read in his sacred books, a descendant of Shem was pre-ordained to drink, and become immortal. But his vizir Al Hidhr[357] lighted on the fountain before him and drank, not knowing what were the virtues of this spring; and when Alexander came afterwards, the water had sunk away, for by God’s command only one man was destined to drink thereof.