Genesis 11:1
The entire world had one language and common words.
Zephaniah 3:9
I will give the peoples a pure language. They may all call upon the name of Jehovah, to serve him (united in total agreement and purpose) shoulder to shoulder.
Acts 2:6
When they heard this sound a crowd came together in confusion, because men heard them speak in their own language.
Isaiah 19:18
When that time comes, the Hebrew language will be spoken in five Egyptian cities. The people there will take their oaths in the name of Jehovah of Hosts. One of the cities will be called: City of Destruction.
Treasury of Scripture Knowledge
Summary
And the whole earth was of one language, and of one speech.
Bible References
Was
Isaiah 19:18
When that time comes, the Hebrew language will be spoken in five Egyptian cities. The people there will take their oaths in the name of Jehovah of Hosts. One of the cities will be called: City of Destruction.
Zephaniah 3:9
I will give the peoples a pure language. They may all call upon the name of Jehovah, to serve him (united in total agreement and purpose) shoulder to shoulder.
Acts 2:6
When they heard this sound a crowd came together in confusion, because men heard them speak in their own language.