Joshua 24:14
Now therefore fear the LORD, and serve him in sincerity and in truth: and put away the gods which your fathers served on the other side of the flood, and in Egypt; and serve you the LORD.
Torrey's Topical Textbook—AKJV

1 Samuel 12:24
Only fear the LORD, and serve him in truth with all your heart: for consider how great things he has done for you.
Torrey's Topical Textbook—AKJV