en_tn_lite_do_not_use/psa/032/004.md

day and night

These extremes include everything in between. Alternate translation: "all the time" (See: rc://en/ta/man/jit/figs-merism)

your hand was heavy upon me

Here "hand" refers to Yahweh. The entire phrase is an idiom that means "you afflicted me." Alternate translation: "you made me suffer greatly" (See: rc://en/ta/man/jit/figs-synecdoche and rc://en/ta/man/jit/figs-idiom)

My strength withered as in summer drought

David's strength is compared to a small, green plant that turns brown and crumbles in the dry season. (See: rc://en/ta/man/jit/figs-simile)