"as if they were coming to a feast." This speaks of how Yahweh summoned his enemies as if he were inviting them to a feast. (See: [[rc://en/ta/man/translate/figs-simile]])
Here the people the author fears are referred to as his "terrors." Alternate translation: "the attackers I was afraid of" (See: [[rc://en/ta/man/translate/figs-metonymy]])
Here "day" is used as an idiom that refers to a general period of time. Alternate translation: "at the time when Yahweh acted in his anger" or "during the time that Yahweh displayed his anger" (See: [[rc://en/ta/man/translate/figs-idiom]])