New Revised Standard Version
Those who love a pure heart and are gracious in speech will have the king as a friend.

Contemporary English Version
The king is the friend of all who are sincere and speak with kindness.

New American Bible
The LORD loves the pure of heart; the person of winning speech has a king for a friend.

Douay-Rheims Bible
He that loveth cleanness of heart, for the grace of his lips shall have the king for his friend.

He that loveth cleanness of heart, for the grace of his lips shall have the king for his friend.

that

Proverbs 16:13 Just lips are the delight of kings: he that speaketh right things shall be loved.

Psalm 101:6 My eyes were upon the faithful of the earth, to sit with me: the man that walked in the perfect way, he served me.

Matthew 5:8 Blessed are the clean of heart: they shall see God.

for the grace of his lips

Psalm 45:2 Thou art beautiful above the sons of men: grace is poured abroad in thy lips; therefore hath God blessed thee for ever.

Luke 4:22 And all gave testimony to him. And they wondered at the words of grace that proceeded from his mouth. And they said: Is not this the son of Joseph?

the king

Genesis 41:39 He said therefore to Joseph: Seeing God hath shewn thee all that thou hast said, can I find one wiser and one like unto thee?

Ezra 7:6 This Esdras went up from Babylon, and he was a ready scribe in the law of Moses, which the Lord God had given to Israel: and the king granted him all his request, according to the hand of the Lord his God upon him.

Nehemiah 2:4-6 Then the king said to me: For what dost thou make request? And I prayed to the God of heaven, . . .

Esther 10:3 And how Mardochai of the race of the Jews, was next after king Assuerus: and great among the Jews, and acceptable to the people of his brethren, seeking the good of his people, and speaking those things which were for the welfare of his seed.

Daniel 2:46-49 Then king Nabuchodonosor fell on his face, and worshipped Daniel, and commanded that they should offer in sacrifice to him victims and incense. . . .

Daniel 3:30 And we have not hearkened to thy commandments, nor have we observed nor done as thou hadst commanded us, that it might go well with us.

Daniel 6:20-23 And coming near to the den, cried with a lamentable voice to Daniel, and said to him: Daniel, servant of the living God, hath thy God, whom thou servest always, been able, thinkest thou, to deliver thee from the lions? . . .