Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
LXX

Lamentations 3:21

This will I lay up in my heart, therefore will I endure. Heth. [It is] the mercies of the Lord, that he has not failed me, because his compassions are not exhausted. Pity [us], O Lord, early [every] month: for we are not brought to an end, because his compassions are not exhausted. [They are] new every morning: great is thy faithfulness. The Lord is my portion, says my soul; therefore will I wait for him.

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