He was an ascetic in the Egyptian Thebaid, then moved to Jordan, where he founded a monastery that still exists today. He established a constitution for his monastery, according to which the monks spent five days in their cells weaving beehives and mats and ate only a little dry bread and dates. On Saturdays and Sundays they gathered in the monastery church and went to a common table. Saint Gerasim ate nothing during Lent. Once he pulled a thorn out of the leg of a lion, which followed him to the monastery, where it remained until the elder's death, and then he collapsed from grief. At first he was inclined to the Monophysite heresy of Eutychius and Dioscorus, but Saint Euthymius turned him away from it. At the Fourth Ecumenical Council he was a great supporter of Orthodoxy. He reposed in 475.

Holy Martyrs Paul and Juliana. Saint James the Faster.