Luke 14:29

14:29 Otherwise, when he has laid a foundation and is not able to finish the tower, all who see it will begin to make fun of him.

Luke 13:4

13:4 Or those eighteen who were killed when the tower in Siloam fell on them, do you think they were worse offenders than all the others who live in Jerusalem?

Luke 14:28

14:28 For which of you, wanting to build a tower, doesn’t sit down first and compute the cost to see if he has enough money to complete it?