obvention

noun2

1. •
   A church revenue, especially one of an occasional or incidental character.

   • His altarage is worth 10s. a year, which is capable of proof, because he leases half of it for 5s., reserving to himself obvention bread. — 1825
2. •
   (no longer used) The act of happening incidentally; that which happens casually; an incidental advantage.

   • Tithes and other obventions. — 1596