Albert Barnes Commentary Luke 4:2

"during forty days, being tempted of the devil. And he did eat nothing in those days: and when they were completed, he hungered." — Luke 4:2 (ASV)

Being forty days tempted. That is, through forty days he was tried in various ways by the devil. The temptations, however, which are recorded by Matthew and Luke did not take place until the forty days were finished. See Matthew 4:2-3.

He did eat nothing. He was sustained by the power of God during this season of extraordinary fasting.