The abstract nouns "faithfulness" and "trustworthiness" can be stated as "faithful" and "trustworthy." This can also be stated in active form. Alternate translation: "The king preserves himself by being trustworthy and faithful to the covenant" (See: [[rc://en/ta/man/translate/figs-activepassive]] and [[rc://en/ta/man/translate/figs-abstractnouns]])
Here "throne" represents the king's power to rule. The abstract noun "love" can be stated as a verb. Also, this can be stated in active form. Alternate translation: "a king ensures that he will rule for a long time by loving others" (See: [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/figs-abstractnouns]] and [[rc://en/ta/man/translate/figs-activepassive]])