I have been looking up church history to see if it ever happened that some one has taken that promise literally and was amazed to find this account that happened in Egypt history around the 10th century.
History tells us:
Saint Simon the Tanner lived towards the end of the tenth century when Egypt was ruled by the Fatimid Caliph Al-Muizz, and Abraam the Syrian was the 62nd Coptic Pope (975 - 978).
At the time, many Copts (Coptic Christians) in Egypt were engaged in handicrafts. Saint Simon worked in one of those crafts widespread in Babylon (Old Cairo) which was tanning, a craft still known there till this day. This profession involved also other crafts that depend on the process, from where St. Simon carried several titles related to skins; Saint Simon the Tanner, the Cobbler, the Shoemaker.[5]
The Caliph Al-Muizz, who reigned during 972-975 AD [6], used to invite different religious leaders to debate in his presence. In one of those meetings in which the patriarch Abraham, also known as Pope Abraam and a Jew named Yaqub (Jacob) Ibn Yusuf Ibn Killis (and in another account of this story, was known as Moses) were present, Abraham got the upper hand in the debate. Plotting to take revenge, Ibn Killis quoted the verse where Jesus Christ, said in Matthew: If you have faith as small as a mustard seed, you can say to the mountain, Move from here to there, and it will move, nothing will be impossible for you (Matthew 17:20), and demanded that the Pope prove that his religion is right by means of this. After heading Ibn Killis say this, the caliph asked Abraham What sayest thou concerning this word? Is it your gospel or not? [7] The patriach answered Yes, it is in it. After hearing Abraham answer, the caliph demanded that this very miracle be performed by Abraham’s hand, or else he would be killed by the hand of the sword. It was then after hearing this that the patriarch asked for three days to complete the miracle. [8]
The Hanging Church, Cairo, built in the 3rd or 4th century AD.Abraham compiled a group of monks, priests and elders. He told them to all stay in the church for three days for a penance. On the morning of the third day, Abraham was praying in the Church of the Holy Virgin al-Mu’allaqa, when he saw the Holy Virgin. The Holy Virgin told him to go to the great market. She said to him: “there thou wilt find a one-eyed man carrying on his shoulder a jar full of water; seize him, for he it is at whose hands this miracle shall be manifested.”[9] Abraham listened to the Holy Virgin and went to the market where he met the man the Holy Virgin spoke of. The man who the Virgin spoke of was Simeon the tanner, who had plucked out his eye because of a passage from the bible (Matthew 5:29-30) which said: If your right eye causes you to sin, gouge it out and throw it away. It is better for you to lose one part of your body than for your whole body to be thrown into hell. And if your right hand causes you to sin, cut it off and throw it away. It is better for you to lose one part of your body than for your whole body to go into hell.
Simeon told Abraham to go out with his priests and all his people to the mountain with the caliph and all his soldiers. Simeon then told Abraham to cry out O Lord, have mercy three times, and each time to make the sign of the cross over the mountain. [10] The patriarch followed the words of Simeon the tanner (who was in the crowd of people) and the mountain was lifted. After the miracle was performed in the presence of the Caliph, the Pope turned left and right looking for St. Simon the Tanner, but he had disappeared and no one could find him (a sign of the saint's great humility).The caliph then turned to Abraham and said O patriarch, I have recognized the correctness of thy faith.
Shortly after the miracle took place, Al-Muizz decided to convert to Christianity. A baptismal font, large enough for the immersion of a grown man, was built for him in the Church of Saint Mercurius. This font still exists today and is known as “Maamoudiat Al-Sultan”, which means, Baptistry of the Sultan. In commemoration of this miracle, the Coptic Orthodox Church observes three days of fasting before the beginning of the Nativity Fast (Advent).