Saint Moses the Strong

"St. Moses was born about 332 AD. In his youth, he was the slave of a high government official who could not tolerate St. Moses’ dishonesty and violence. It was even said that St. Moses went so far as to commit murder. Finally, his master drove him out of his house. St. Moses became the head of a gang of seventy robbers. He was a strong and fierce man of huge stature. 

Once, as he was walking along the banks of the Nile, he spotted some sheep and a shepherd on the opposite side of the Nile. The Nile at that time was at full flood and more than a mile wide. St. Moses put his sword between his teeth and swam across the river. When the shepherd saw him, he ran away and buried himself in the sand. The sheep were left for St. Moses, who chose four of the best rams, slew them and tied them with a rope. He then carried them on his back and swam back across the river. He came to a small village where he skinned the rams, ate the best portions of them, and sold the rest for wine.

The specific circumstances regarding St. Moses conversion are not known. It was mentioned that St. Moses used to address the sun saying, If you are god let me know, and You the God whom I know not, lead me to You. St. Moses heard from someone that the monks in the wilderness of Scetis knew God, so he immediately girded himself with his sword and went to the wilderness. [...]

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Once the Fathers of the Scetis were holding a council to reprimand a monk who had committed a fault. St. Moses was invited, but he refused to attend. The priest went to him, and said, Come, for the people are expecting you. St. Moses arose, took a basket filled with sand that had a hole in the bottom of it, carried it on his shoulder and started walking towards the council. When the monks saw him coming with the bag of sand, with sand pouring out of the hole, they asked him the reason of his behavior. He said to them, The sand you see running from the bag represents my sins which are always following me, and yet, today I am coming to judge the errors of my brother. When they heard this, they left the council and every monk went to his own cell, as none could judge that monk."  Source