After a while he returned to take her; and he turned aside to see the carcass of the lion: and, behold, there was a swarm of bees in the body of the lion, and honey.
Even though God strengthened him, Samson used that strength for his own purposes, not to fulfill God’s will. Note David’s very different reaction to God enabling him to kill a lion and a bear in 1 Samuel 17:34-37.