en_tn_lite_do_not_use/lam/03/23.md

they are new every morning

The word "they" refers to God's steadfast love and compassions. Their being new represents God continuing to act according to them. Alternate translation: "every morning he treats us again with steadfast love and compassion" (See: rc://en/ta/man/jit/figs-metaphor)

your faithfulness

The word "your" refers to Yahweh.