American Standard Version
They are created now, and not from of old; and before this day thou heardest them not; lest thou shouldest say, Behold, I knew them.

Berean Study Bible
They are created now, and not long ago; you have not heard of them before today. So you cannot claim, ‘I already knew them!’

Douay-Rheims Bible
They are created now, and not of old: and before the day, when thou heardest them not, lest thou shouldst say: Behold I knew them.

English Revised Version
They are created now, and not from of old; and before this day thou heardest them not; lest thou shouldest say, Behold, I knew them.

King James Bible
They are created now, and not from the beginning; even before the day when thou heardest them not; lest thou shouldest say, Behold, I knew them.

World English Bible
They are created now, and not from of old; and before this day you didn't hear them; lest you should say, 'Behold, I knew them.'

Young's Literal Translation
Now they have been produced and not from that time, Yea, before the day, and thou hast not heard them, Lest thou say, 'Lo, I have known them.'

Isaiah 48:7 Additional Translations ...