Isaiah 28:11
for with stammering lips and another tongue He will speak to this people.
1 Corinthians 14:21
In the Law it is written, "By other tongues and other lips I will speak to this people, and even so they will not hear Me, says the Lord."
Deuteronomy 28:49
Jehovah shall bring a nation against you from far, from the end of the earth, as the eagle flies; a nation whose tongue you shall not understand,
Isaiah 33:19
You shall not see a fierce people, a people of a deeper speech than you can understand; of a foreign tongue that no one understands.
Jeremiah 5:15
Lo, I will bring a nation on you from afar, O house of Israel, says Jehovah. It is an enduring nation, it is an ancient nation, a nation whose language you do not know, nor understand what they say.