Charles Ellicott Commentary Jonah 2:8

"They that regard lying vanities Forsake their own mercy." — Jonah 2:8 (ASV)

Those who observe lying vanities.— See Note, Psalms 31:6.

Forsake their own mercy— i.e., forfeit their own share of the covenant grace. In Psalm 37:28 it is said that Jehovah does not forsake his chasîdim; they, however, by forsaking Jehovah (Himself called Israel’s mercy,Psalms 144:2, margin) and His law (Psalms 89:30) can forfeit their chesed or covenant privilege.