en_tn_lite_do_not_use/psa/063/011.md

the king

David is speaking about himself. AT: "I, the king of Israel" UDB

swears by him ... proud of him

The word "him" refers to "God".

but the mouth of those who speak lies will be stopped up

AT: "but God will silence the mouths of liars" (See: rc://en/ta/man/translate/figs-activepassive)

the mouths of those who speak lies

AT: "liars" (See: rc://en/ta/man/translate/figs-synecdoche)