Genesis 8:12

 "He waited seven more days and sent the dove out again, but this time it did not return to him."  Genesis 8:12

 

Noah gave it another week after getting the olive leaf from the dove and then he sent it out again.  This time, the dove didn't come back.  It had found a good place to rest and it didn't want to go back to being cooped up in the ark with all the other animals.