1 Chronicle 25:3 - prophesied with a harp

1 Chronicle 25:3b - 
who prophesied with a harp to give thanks and to praise the Lord.

1 Chronicles 15:13 - There is A Prescribed Way

1 Chronicles 15:13 (NIV) 
It was because you, the Levites, did not bring it up the first time that the LORD our God broke out in anger against us. We did not inquire of him about how to do it in the prescribed way."

2 Kings 20:3 - A loyal heart

“Remember now, O LORD, I pray, how I have walked before You in truth and with a loyal heart, and have done what was good in Your sight.” And Hezekiah wept bitterly.