Final answer:
After being sent out a second time by Noah, the dove returned with an olive leaf in its bill, symbolizing the receding flood waters and the return of life.
Step-by-step explanation:
The dove brought back an olive leaf in its bill after Noah sent it out a second time. This event is found in the biblical story of Noah's Ark, as told in the book of Genesis in the Bible. When the dove returned with the olive leaf, it was a sign that the flood waters were receding and that life was returning to the Earth. The olive leaf has since become a symbol of peace and new beginnings.