NET
18 do not boast over the branches. But if you boast, remember that you do not support the root, but the root supports you.
Darby
18 boast not against the branches; but if thou boast, [it is] not *thou* bearest the root, but the root thee.
KJV
18 Boast not against the branches. But if thou boast, thou bearest not the root, but the root thee.