Some translations set each line of poetry farther to the right than the rest of the text to make it easier to read. The ULB does this with the poetic song in 1:19-27.
David used two figures of speech to express that Jonathan and Saul were great warriors: "the bow of Jonathan did not turn back, and the sword of Saul did not return empty." (See: [[rc://en/ta/man/jit/figs-synecdoche]])