Cross reference
Isaiah 33:19
19 The strong people thou seest not, A people deeper of lip than to be understood, Of a scorned tongue, there is no understanding.
Isaiah 28:11
11 For by scorned lip, and by another tongue, Doth He speak unto this people.
Deuteronomy 28:49-50
49 `Jehovah doth lift up against thee a nation, from afar, from the end of the earth, as the eagle it flieth; a nation whose tongue thou hast not heard,
50 a nation -- fierce of countenance -- which accepteth not the face of the aged, and the young doth not favour;
Jeremiah 5:15
15 Lo, I am bringing against you a nation from afar, O house of Israel, an affirmation of Jehovah, A nation -- strong it `is', a nation -- from of old it `is', A nation -- thou knowest not its tongue, Nor understandest what it speaketh.
2 Kings 19:32
32 Therefore, thus said Jehovah, Concerning the king of Asshur: He doth not come in unto this city, Nor doth he shoot there an arrow, Nor doth he come before it with shield. Nor doth he pour out against it a mount.
Ezekiel 3:5-6
5 For, not unto a people deep of lip and heavy of tongue `art' thou sent -- unto the house of Israel;
6 not unto many peoples, deep of lip and heavy of tongue, whose words thou dost not understand. If I had not sent thee unto them -- they, they do hearken unto thee,
Exodus 14:13
13 And Moses saith unto the people, `Fear not, station yourselves, and see the salvation of Jehovah, which He doth for you to-day; for, as ye have seen the Egyptians to-day, ye add no more to see them -- to the age;
1 Corinthians 14:21
21 in the law it hath been written, that, `With other tongues and with other lips I will speak to this people, and not even so will they hear Me, saith the Lord;'