Genesis 26:14 records that the Philistines envied Isaac. The Philistines were historically the enemies of the Israelites and they envied Isaac, because Isaac had become not just a great man, but a very great man with possessions of flocks, herds and servants. He had reaped a hundredfold from what he had sowed in the land of Gerar, in that same year. Why, not because of his own doing or efforts, but because the Lord blessed him.

Points to ponder:
When the hand of the Lord is upon you, then what you sow with your hand can reap a hundredfold in a period and not just become great but very great, much to the envy of your enemies. If your enemies envy you, they do so mostly because they are looking at your possessions and it is easy to lose focus for us as well to foolishly look not at our possessions, but instead we need to look at the Lord God, the possessor of all things and praise him alone, for that is an evidence of God’s hand upon you and his blessings are a hundredfold in your life. Do your enemies envy you?

Genesis 26:12-14 (KJV)
12 Then Isaac sowed in that land, and received in the same year an hundredfold: and the Lord blessed him.
13 And the man waxed great, and went forward, and grew until he became very great:
14 For he had possession of flocks, and possession of herds, and great store of servants: and the Philistines envied him.