In Luke 15, how many sheep did the shepherd leave in the pasture to search for the lost one?

Answer: Ninety-nine

He left the ninety-nine to find the one lost sheep. There is more joy in heaven over one sinner who repents.

““What man among you, if he has a hundred sheep and loses one of them, does not leave the ninety-nine in the pasture and go after the one that is lost, until he finds it?”— Luke 15:4 (BSB)