New King James Version
They did not understand that He spoke to them of the Father.

King James Bible
They understood not that he spake to them of the Father.

American Standard Version
They perceived not that he spake to them of the Father.

Berean Study Bible
They did not understand that He was telling them about the Father.

Douay-Rheims Bible
And they understood not, that he called God his Father.

English Revised Version
They perceived not that he spake to them of the Father.

World English Bible
They didn't understand that he spoke to them about the Father.

Young's Literal Translation
They knew not that of the Father he spake to them;

John 8:27 Additional Translations ...