Only fear the LORD, and serve Him in truth with all your heart; for consider what great things He has done for you.
1 Samuel 12:24
Surrounding context
12:23 Moreover, as for me, far be it from me that I should sin against the LORD in ceasing to pray for you; but I will teach you the good and the right way.
12:24 Only fear the LORD, and serve Him in truth with all your heart; for consider what great things He has done for you.
12:25 But if you still do wickedly, you shall be swept away, both you and your king."