'Happily' in the Bible

And Joshua made peace with them, and {he made a covenant with them} to allow them to live happily, and the leaders of the congregation swore [an oath] to them.

And Zeresh his wife and all of his friends said to him, "Let them make a gallows fifty cubits high, and in the morning tell the king, "Let them hang Mordecai on it; then go with the king to the banquet happily." The advice pleased Haman, so he had the gallows made.

but he has told me, "My grace is all you need, because my power is perfected in weakness." Therefore, I will most happily boast about my weaknesses, so that the Messiah's power may rest on me.