"Woe to you, scribes and Pharisees, hypocrites! For you travel land and sea to win one proselyte, and when he is won, you make him twice as much a son of hell as yourselves.
Matthew 23:15
Surrounding context
23:14 Woe to you, scribes and Pharisees, hypocrites! For you devour widows' houses, and for a pretense make long prayers. Therefore you will receive greater condemnation.
23:15 "Woe to you, scribes and Pharisees, hypocrites! For you travel land and sea to win one proselyte, and when he is won, you make him twice as much a son of hell as yourselves.
23:16 "Woe to you, blind guides, who say, "Whoever swears by the temple, it is nothing; but whoever swears by the gold of the temple, he is obliged to perform it.'