John Gill Commentary Luke 4:3

"And the devil said unto him, if thou art the Son of God, command this stone that it become bread." — Luke 4:3 (ASV)

And the devil said to him
Who now visibly appeared, and spoke to him with an articulate voice:

if you are the Son of God ;
as has been just now declared by a voice from heaven; or seeing you are in such a relation to God, and so equal to him, and possessed of all divine perfections, and among the rest, of almighty power; wherefore, since you are hungry, and in a wilderness, where no food is to be had,

command this stone that it be made bread ;
say but the word, and this stone, which he held out to him, or pointed at, as lying before them, or any one of the stones, which were in sight, for Matthew speaks of them in the plural number, will immediately be converted into bread, if he was what he was said to be: this he suggests might easily be effected by him, and he had no need to continue hungry.