John Gill Commentary Acts 7:31

"And when Moses saw it, he wondered at the sight: and as he drew near to behold, there came a voice of the Lord," — Acts 7:31 (ASV)

When Moses saw it, he wondered at the sight
To see a bush on fire was no extraordinary thing; but to see a bush on fire, and yet not consumed by it, which was the case here, was wonderful indeed: and that an angel of the Lord, or the Lord himself, should appear in it, made it still more amazing; though, as yet, this was not observed by Moses, only the former; and which struck him with wonder, and excited his curiosity:

and as he drew near to behold it ;
to take a more exact view of it, and satisfy himself with the truth of it, and, if it was possible, to find out the reason why it was not burnt:

the voice of the Lord came unto him ;
to his ears, out of the bush, and expressed the following words.