Proverbs 22:11 in the King James Version
He that loveth pureness of heart, for the grace of his lips the king shall be his friend.
Context
10 Drive out the mocker, and strife will go out; yes, quarrels and insults will stop.
11 He who loves purity of heart and speaks gracefully is the king’s friend.
12 The LORD’s eyes watch over knowledge, but he frustrates the words of the unfaithful.