Exodus 20:22

And Jehovah said to Moses, Thus shalt thou say to the children of Israel: Ye have seen that I have spoken with you from the heavens.

Nehemiah 9:13

And thou camest down on mount Sinai, and didst speak with them from the heavens, and gavest them right judgments and true laws, good statutes and commandments.

Deuteronomy 4:36

From the heavens he made thee hear his voice, that he might instruct thee; and on the earth he shewed thee his great fire; and thou heardest his words from the midst of the fire.

Hebrews 12:25-26

See that ye refuse not him that speaks. For if those did not escape who had refused him who uttered the oracles on earth, much more we who turn away from him who does so 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
From the heavens he made thee hear his voice, that he might instruct thee; and on the earth he shewed thee his great fire; and thou heardest his words from the midst of the fire.
Nehemiah 9:13
And thou camest down on mount Sinai, and didst speak with them from the heavens, and gavest them right judgments and true laws, good statutes and commandments.
Hebrews 12:25
See that ye refuse not him that speaks. For if those did not escape who had refused him who uttered the oracles on earth, much more we who turn away from him who does so from heaven:

General references

Genesis 17:22
And he left off talking with him; and God went up from Abraham.
Deuteronomy 4:36
From the heavens he made thee hear his voice, that he might instruct thee; and on the earth he shewed thee his great fire; and thou heardest his words from the midst of the fire.
Deuteronomy 5:4
Face to face on the mountain from the midst of the fire Jehovah spoke with you