Exodus 20:22

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

Nehemiah 9:13

Thou didst come down upon Mount Sinai and didst speak with them from heaven and didst give them right judgments and true laws, good statutes and commandments,

Deuteronomy 4:36

Out of the heavens he made thee to hear his voice that he might instruct thee, and upon earth he showed thee his great fire, and thou hast heard his words out of the midst of the fire.

Hebrews 12:25-26

See that you do not refuse him that speaks. For if those who refused him that spoke on earth did not escape, much less shall we escape, if we turn away from him that speaks from the heavens,

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 the heavens he made thee to hear his voice that he might instruct thee, and upon earth he showed thee his great fire, and thou hast heard his words out of the midst of the fire.
Nehemiah 9:13
Thou didst come down upon Mount Sinai and didst speak with them from heaven and didst give them right judgments and true laws, good statutes and commandments,
Hebrews 12:25
See that you do not refuse him that speaks. For if those who refused him that spoke on earth did not escape, much less shall we escape, if we turn away from him that speaks from the heavens,

General references

Genesis 17:22
And he left off talking with him, and God went up from Abraham.
Deuteronomy 4:36
Out of the heavens he made thee to hear his voice that he might instruct thee, and upon earth he showed thee his great fire, and thou hast heard his words out of the midst of the fire.
Deuteronomy 5:4
The LORD spoke with you face to face in the mount out of the midst of the fire