Anastasius of Sinai

Our venerable and God-bearing Father Anastasius of Sinai (also Anastasios or Anastasius Sinaita ) is a 7th century saint who left the world and everything in it. He is considered one of the Greek Fathers of the Church . St. Anastasius is commemorated on April 20 and along with his fellow ascetics each Bright Wednesday , the Synaxis of the Monastic Fathers of Sinai . Another saint called "Anastasius of Sinai" was Patriarch Anastasius I of Antioch who is also commemorated on April 20.
He took up his cross according to the Lord's commandment, was tonsured , and became a monk , following the Lord willingly. He became a lover of the greatest struggles for virtue. He went to Jerusalem and, after he had venerated the saints and the venerable places, he came to Mount Sinai. There Anastasius found a group of monks who led a strict ascetic life, so he stayed and submitted himself to them as a servant. Thus he became very humble and received from God gifts of knowledge and great wisdom, through which he wrote the lives of holy fathers and composed edifying sermons . Anastasius eventually became abbot of the whole ascetic community at Sinai. He departed to the Lord full of years.

Source: OrthodoxWiki