Exodus 20:22

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

Nehemiah 9:13

Thou camest down also upon mount Sinai, and spakest unto them from heaven, and gavest them right judgments, true laws, good commandments and statutes,

Deuteronomy 4:36

Out of heaven he made thee hear his voice to nurture thee, and upon earth he showed thee his great fire, and thou heardest his words out of the fire.

Hebrews 12:25-26

See that ye despise not him that speaketh. For if they escaped not which refused him that spake on earth; Much more shall we not escape, if we turn away from him that speaketh 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 he made thee hear his voice to nurture thee, and upon earth he showed thee his great fire, and thou heardest his words out of the fire.
Nehemiah 9:13
Thou camest down also upon mount Sinai, and spakest unto them from heaven, and gavest them right judgments, true laws, good commandments and statutes,
Hebrews 12:25
See that ye despise not him that speaketh. For if they escaped not which refused him that spake on earth; Much more shall we not escape, if we turn away from him that speaketh from heaven:

General references

Genesis 17:22
And God left off talking with him, and departed up from Abraham.
Deuteronomy 4:36
Out of heaven he made thee hear his voice to nurture thee, and upon earth he showed thee his great fire, and thou heardest his words out of the fire.
Deuteronomy 5:4
The LORD talked with you face to face in the mount out of the fire.