'Voice of the Lord' in the Bible

And said, If thou wilt diligently hearken to the voice of the LORD thy God, and wilt do that which is right in his sight, and wilt give ear to his commandments, and keep all his statutes, I will put none of these diseases upon thee, which I have brought upon the Egyptians: for I am the LORD that healeth thee.

And Moses went up to God, and the voice of the Lord came to him from the mountain, saying, Say to the family of Jacob, and give word to the children of Israel: