Berean Study Bible
So if you cannot do such a small thing, why do you worry about the rest?

King James Bible
If ye then be not able to do that thing which is least, why take ye thought for the rest?

American Standard Version
If then ye are not able to do even that which is least, why are ye anxious concerning the rest?

Darby Bible Translation
If therefore ye cannot [do] even what is least, why are ye careful about the rest?

Douay-Rheims Bible
If then ye be not able to do so much as the least thing, why are you solicitous for the rest?

English Revised Version
If then ye are not able to do even that which is least, why are ye anxious concerning the rest?

Young's Literal Translation
If, then, ye are not able for the least -- why for the rest are ye anxious?