Cross reference
Isaiah 33:19
19 Thou shalt not see a fierce people, a people of a deeper speech than thou canst perceive; of a stammering tongue, that thou canst not understand.
Isaiah 28:11
11 For with stammering lips and another tongue will he speak to this people.
Deuteronomy 28:49-50
49 The LORD shall bring a nation against thee from far, from the end of the earth, as swift as the eagle flieth; a nation whose tongue thou shalt not understand;
50 A nation of fierce countenance, which shall not regard the person of the old, nor show favor to the young:
Jeremiah 5:15
15 Lo, I will bring a nation upon you from far, O house of Israel, saith the LORD: it is a mighty nation, it is an ancient nation, a nation whose language thou knowest not, neither understandest what they say.
2 Kings 19:32
32 Therefore thus saith the LORD concerning the king of Assyria, He shall not come into this city, nor shoot an arrow there, nor come before it with shield, nor cast a bank against it.
Ezekiel 3:5-6
5 For thou art not sent to a people of a strange speech and of an hard language, but to the house of Israel;
6 Not to many people of a strange speech and of an hard language, whose words thou canst not understand. Surely, had I sent thee to them, they would have hearkened unto thee.
Exodus 14:13
13 And Moses said unto the people, Fear ye not, stand still, and see the salvation of the LORD, which he will show to you to day: for the Egyptians whom ye have seen to day, ye shall see them again no more for ever.
1 Corinthians 14:21
21 In the law it is written, With men of other tongues and other lips will I speak unto this people; and yet for all that will they not hear me, saith the Lord.