King James Bible
That thou mightest know the certainty of those things, wherein thou hast been instructed.

New King James Version
that you may know the certainty of those things in which you were instructed.

American Standard Version
that thou mightest know the certainty concerning the things wherein thou wast instructed.

Berean Study Bible
so that you may know the certainty of the things you have been taught.

Douay-Rheims Bible
That thou mayest know the verity of those words in which thou hast been instructed.

English Revised Version
that thou mightest know the certainty concerning the things wherein thou wast instructed.

World English Bible
that you might know the certainty concerning the things in which you were instructed.

Young's Literal Translation
that thou mayest know the certainty of the things wherein thou wast instructed.

Luke 1:4 Additional Translations ...