Votary

a. [From Lat. votus, p. p. of vovere, to vow, to devote.] Consecrated by a vow or promise; consequent on a vow; devoted; promised.

Votary resolution is made equipollent to custom. Bacon.

n. One devoted, consecrated, or engaged by a vow or promise; hence, especially, one devoted, given, or addicted to some particular service, worship, study, or state of life. “Love's fond votary.” Shaft.

It was the coldness of the votary, not the prayer, which was in fault. Felt.