Matthew 23:15

Woe to you, scribes and Pharisees, you hypocrites! You traverse land and sea to win a single convert, and when he becomes one, you make him twice as much a son of hell as you are.

Note Greek Gehenna; also in verse 33

Woe unto you, scribes and Pharisees, hypocrites! for ye compass sea and land to make one proselyte, and when he is made, ye make him twofold more the child of hell than yourselves.

Woe to you, scribes and Pharisees, hypocrites! For you travel around by sea and land to make one proselyte; and when he becomes one, you make him twice as much a son of Gehenna as yourselves.

Note or, Hell

Woe unto you, scribes and Pharisees, hypocrites! for ye compass sea and land to make one proselyte; and when he is become so, ye make him twofold more a son of hell than yourselves.