NET
24 “Exert every effort to enter through the narrow door, because many, I tell you, will try to enter and will not be able to.
Darby
24 Strive with earnestness to enter in through the narrow door, for many, I say to you, will seek to enter in and will not be able.
KJV
24 “Strive to enter in at the strait gate: for many, I say unto you, will seek to enter in, and shall not be able.”