Exodus 20:22

The LORD said to Moses, "This is what you shall tell the children of Israel: 'You yourselves have seen that I have talked with you from heaven.

Nehemiah 9:13

"You came down also on Mount Sinai, and spoke with them from heaven, and gave them right ordinances and true laws, good statutes and commandments,

Deuteronomy 4:36

Out of heaven he made you to hear his voice, that he might instruct you: and on earth he made you to see his great fire; and you heard his words out of the midst of the fire.

Hebrews 12:25-26

See that you do not refuse him who speaks. For if they did not escape when they refused him who warned on the earth, how much more will we not escape who turn away from him who warns 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 you to hear his voice, that he might instruct you: and on earth he made you to see his great fire; and you heard his words out of the midst of the fire.
Nehemiah 9:13
"You came down also on Mount Sinai, and spoke with them from heaven, and gave them right ordinances and true laws, good statutes and commandments,
Hebrews 12:25
See that you do not refuse him who speaks. For if they did not escape when they refused him who warned on the earth, how much more will we not escape who turn away from him who warns from heaven,

General references

Genesis 17:22
When he finished talking with him, God went up from Abraham.
Deuteronomy 4:36
Out of heaven he made you to hear his voice, that he might instruct you: and on earth he made you to see his great fire; and you heard his words out of the midst of the fire.
Deuteronomy 5:4
The LORD spoke with you face to face on the mountain out of the midst of the fire,