GOD'S WORD® Translation
So they were asking each other, "What does he mean when he says, 'In a little while'? We don't understand what he's talking about."

American Standard Version
They said therefore, What is this that he saith, A little while? We know not what he saith.

Berean Study Bible
They kept asking, “Why is He saying, ‘a little while’? We do not understand what He is saying.”

Douay-Rheims Bible
They said therefore: What is this that he saith, A little while? we know not what he speaketh.

English Revised Version
They said therefore, What is this that he saith, A little while? We know not what he saith.

King James Bible
They said therefore, What is this that he saith, A little while? we cannot tell what he saith.

World English Bible
They said therefore, "What is this that he says, 'A little while?' We don't know what he is saying."

Young's Literal Translation
they said then, 'What is this he saith -- the little while? we have not known what he saith.'

John 16:18 Additional Translations ...