Luke 14:28-32

28For which one of you, when he wants to build a tower, does not first sit down and calculate the cost, to see if he has enough to complete it?

29Otherwise, when he has laid a foundation and is not able to finish, all who are watching it will begin to ridicule him,

30saying, ‘This person began to build, and was not able to finish!’

31Or what king, when he sets out to meet another king in battle, will not first sit down and 1consider whether he is strong enough with ten thousand men to face the one coming against him with twenty thousand?

32Otherwise, while the other is still far away, he sends a delegation and requests terms of peace.