We are told not to “say” (559) this. There is no magic in this word. It is used over 5000 times in the Old Testament. I would say that makes it common. I have already commented on the aspect of turning the other cheek but there is another interesting aspect to his verse. If you look back at verse 12 you find that God has made this statement.
(Proverbs 24:12 KJV) If thou sayest, Behold, we knew it not; doth not he that pondereth the heart consider it? and he that keepeth thy soul, doth not he know it? and shall not he render to every man according to his works?In fact if you do a little research you will find that there are a number of places in both the OT and NT where it is stated that God will respond to people according to their “work” (6467). For those of us who were raised on the concept of “Grace, good; works, bad” this is a bit unsettling. Yes, grace is the force behind our salvation but keep in mind that our behavior is in the mix somehow. Before you cast me out read verses 12 and 29 again and notice it is not my words but Gods.
So? Rejoice in grace. We cannot ever earn our salvation. Live in obedience. In some way it makes a difference.