Isaiah 28:11

You will no longer see a fierce people, A people of unintelligible speech which no one comprehends, Of a stammering tongue which no one understands.

“Behold, I am bringing a nation against you from afar, O house of Israel,” declares Yahweh. “It is an enduring nation; It is an ancient nation, A nation whose tongue you do not know, Nor can you understand what they say.

“Thus says Yahweh of hosts, the God of Israel, ‘Go and say to the men of Judah and the inhabitants of Jerusalem, “Will you not receive discipline by listening to My words?” declares Yahweh.

“For you are not being sent to a people of unintelligible lips or a difficult tongue, but to the house of Israel,

In the Law it is written, “By men of strange tongues and by the lips of strangers I will speak to this people, and even so they will not listen to Me,” says the Lord.