en_tn_condensed/psa/017/005.md

My steps have held firmly to your tracks; my feet have not slipped

Both of these clauses mean the same thing. The repetition adds emphasis. (See: rc://en/ta/man/jit/figs-parallelism)

my feet have not slipped

The writer speaks of his obedience to God as if he were walking on a path. Alternate translation: "I am determined to follow your ways" (See: rc://en/ta/man/jit/figs-metaphor and rc://en/ta/man/jit/figs-litotes)