Then Jesus was led up by the Spirit into the wilderness to be tempted by the devil.  And when He had fasted forty days and forty nights, afterward He was hungry.  

Now when the tempter came to Him, he said, "If You are the Son of God, command that these stones become bread."  

But He answered and said, "It is written, 'Man shall not live by bread alone, but by every word that proceeds from the mouth of God.' "

Matthew 4:1-5   (NKJV)