The abstract noun "faithfulness" can be stated as "faithfully" or "faithful." Alternate translation: "I faithfully love thousands of those who love me" or "I am faithful to the covenant with thousands of those who love me" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])
The word "thousands" is a metonym for a number too many to count. Alternate translation: "forever to those who love me" (See: [[rc://en/ta/man/translate/figs-explicit]] and [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/translate-numbers]])