Isaiah 28:11
With stammering lips and another tongue he will speak to this people.
1 Corinthians 14:21
It is written in the law: With men of other tongues and lips of foreigners I will speak to this people. Even then they will not listen to me, said Jehovah.
Deuteronomy 28:49
Jehovah will bring a nation against you from far away, from the end of the earth, as the eagle swoops down, a nation whose language you will not understand,
Isaiah 33:19
You will see those arrogant people no more, those people of an obscure speech, with their strange, incomprehensible tongue.
Jeremiah 5:15
I am bringing a nation against you from afar, O house of Israel, declares Jehovah. It is an enduring nation. It is an ancient nation, a nation whose language you do not know. You cannot understand (comprehend) (make sense of) what they say.