NET
5 Then I said, “Please, O Lord God of heaven, great and awesome God, who keeps his loving covenant with those who love him and obey his commandments,
Darby
5 and said, I beseech thee, Jehovah, God of the heavens, the great and terrible God, that keepeth covenant and mercy for them that love him and keep his commandments.
KJV
5 And said, I beseech thee, O LORD God of heaven, the great and terrible God, that keepeth covenant and mercy for them that love him and observe his commandments: