Authorized Version
    And through thy knowledge shall the weak brother perish, for whom Christ died?

American Standard Version
    For through thy knowledge he that is weak perisheth, the brother for whose sake Christ died.

The Bible in Basic English
    And so, through your knowledge, you are the cause of destruction to your brother, for whom Christ underwent death.

The Darby Bible
    and the weak [one], the brother for whose sake Christ died, will perish through thy knowledge.

The Webster Bible
    And through thy knowledge shall the weak brother perish, for whom Christ died?

Young's Literal Translation
    and the brother who is infirm shall perish by thy knowledge, because of whom Christ died?

World English Bible
    And through your knowledge, he who is weak perishes, the brother for whose sake Christ died.