'Angel of God' in the Bible

So your servant said, 'May the word of my lord the king be my security, for my lord the king is like the angel of God when it comes to deciding between right and wrong! May the Lord your God be with you!'"

Your servant Joab did this so as to change this situation. But my lord has wisdom like that of the angel of God, and knows everything that is happening in the land."

But my servant has slandered me to my lord the king. But my lord the king is like an angel of God. Do whatever seems appropriate to you.