Treatises on Faith and the Eucharist (Lord's Supper), by Yúḥanān bar Zúʻbí (12th/13th century), a learned monk and scholar in the Church of the East, as follows: 1. "ʻAl šarbā d-haymānútā" (On matter of faith), also called "Zqúrā mlaḥmā ...