Charles Ellicott Commentary Psalms 57:4

"My soul is among lions; I lie among them that are set on fire, Even the sons of men, whose teeth are spears and arrows, And their tongue a sharp sword." — Psalms 57:4 (ASV)

Them that are set on fire. —Rather, greedy ones (literally, lickers) in apposition to lions. The verse expresses the insecurity of the poet, who, his dwelling being in the midst of enemies, must go to sleep every night with the sense of danger all around him. (See Septuagint) How grandly the refrain in Psalm 57:8 rises from such a situation.