Berean Study Bible
It is like a mustard seed, which is the smallest of all seeds sown upon the earth.

King James Bible
It is like a grain of mustard seed, which, when it is sown in the earth, is less than all the seeds that be in the earth:

American Standard Version
It is like a grain of mustard seed, which, when it is sown upon the earth, though it be less than all the seeds that are upon the earth,

Darby Bible Translation
As to a grain of mustard [seed], which, when it is sown upon the earth, is less than all seeds which are upon the earth,

Douay-Rheims Bible
It is as a grain of mustard seed: which when it is sown in the earth, is less than all the seeds that are in the earth:

English Revised Version
It is like a grain of mustard seed, which, when it is sown upon the earth, though it be less than all the seeds that are upon the earth,

Young's Literal Translation
As a grain of mustard, which, whenever it may be sown on the earth, is less than any of the seeds that are on the earth;