51 Grk “they kept on saying.”
52 Grk “What is this that he says.”
53 Grk “A little while.” Although the phrase τὸ μικρόν (to mikron) in John 16:18 could be translated simply “a little while,” it was translated “in a little while” to maintain the connection to John 16:16, where it has the latter meaning in context.
54 Or “we do not know.”
55 Grk “what he is speaking.”

In other versions

So they were saying, “What does he mean by ‘a little while’? We do not know what he is talking about.”

They kept asking, “What does he mean by ‘a little while’? We don’t understand what he is saying.”

They said, “What is this he is saying, ‘In a little while’? We don’t know what he’s talking about.”

And what does he mean by ‘a little while’? We don’t understand.”

So they kept on saying, “What is this that he is saying, ‘A little while’? We do not understand what he is speaking about!”

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

Public Domain