Isaiah 28:11
For he will speak with {stammering} and another tongue to this people,
1 Corinthians 14:21
In the law it is written: "By those who speak a foreign language and by the lips of others I will speak to this people, and not even in this way will they obey me," says the Lord.
Deuteronomy 28:49
Yahweh will raise [up] against you a nation from far [off], from the end of the earth, [attacking] as the eagle swoops [down], {a nation whose language you will not understand},
Isaiah 33:19
You will not see [the] insolent people, [the] people {whose language is too obscure to understand}, [whose] stammering of tongue {cannot be understood}.
Jeremiah 5:15
Look, I [am] about to bring on you a nation from afar, house of Israel," {declares} Yahweh. "It [is] an enduring nation, it [is] {an ancient nation}. A nation whose language you do not know, and you cannot understand what they speak.