Exodus 20:22

And the Lord said to Moses, Say to the children of Israel, You yourselves have seen that my voice has come to you from heaven

Nehemiah 9:13

And you came down on Mount Sinai, and your voice came to them from heaven, giving them right decisions and true laws, good rules and orders:

Deuteronomy 4:36

Out of heaven itself his voice came to you, teaching you; and on earth he let you see his great fire; and his words came to your ears out of the heart of the fire.

Hebrews 12:25-26

See that you give ear to his voice which comes to you. For if those whose ears were shut to the voice which came to them on earth did not go free from punishment, what chance have we of going free if we give no attention to him whose voice comes from heaven?

Treasury of Scripture Knowledge

Summary

And the LORD said unto Moses, Thus thou shalt say unto the children of Israel, Ye have seen that I have talked with you from heaven.

Bible References

I have talked

Deuteronomy 4:36
Out of heaven itself his voice came to you, teaching you; and on earth he let you see his great fire; and his words came to your ears out of the heart of the fire.
Nehemiah 9:13
And you came down on Mount Sinai, and your voice came to them from heaven, giving them right decisions and true laws, good rules and orders:
Hebrews 12:25
See that you give ear to his voice which comes to you. For if those whose ears were shut to the voice which came to them on earth did not go free from punishment, what chance have we of going free if we give no attention to him whose voice comes from heaven?

General references

Genesis 17:22
And having said these words, God went up from Abraham.
Deuteronomy 4:36
Out of heaven itself his voice came to you, teaching you; and on earth he let you see his great fire; and his words came to your ears out of the heart of the fire.
Deuteronomy 5:4
The word of the Lord came to you face to face on the mountain, out of the heart of the fire,

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain