Luke 14:28-30

Amplified Bible

²⁸ For which one of you, when he wants to build a watchtower [for his guards], does not first sit down and calculate the cost, to see if he has enough to finish it? ²⁹ Otherwise, when he has laid a foundation and is unable to finish [the building], all who see it will begin to ridicule him, ³⁰ saying, ‘This man began to build and was not able to finish!’