Where Does The Phrase "Look Before You Leap"� Come From?

This phrase comes from an Aesop's fable. A fox went to drink from a deep well, and accidentally fell in. He was trying unsuccessfully to get out when a goat came by. Seeing the fox in the wel she asked if the water was good to drink. The fox relied that it was excellent, and urged the goat to join him. She at once leaped into the well. Once she was there, the fox admitted that he couldn't get out, and suggested that he escape by climbing on her back and then go to fetch help. The goat readily agreed. The fox jumped on her back, scrambled out of the well and turned back, saying, "If you had as much brain as you have wool, you would look before you leap; and you wouldn't get into anything you can't get out of." Then he ran cheerfully off, leaving the captive goat to bleat for help.