English Standard Version
They have known for a long time, if they are willing to testify, that according to the strictest party of our religion I have lived as a Pharisee.

American Standard Version
having knowledge of me from the first, if they be willing to testify, that after the straitest sect of our religion I lived a Pharisee.

Berean Study Bible
They have known me for a long time and can testify, if they are willing, that I lived as a Pharisee, adhering to the strictest sect of our religion.

Douay-Rheims Bible
Having known me from the beginning (if they will give testimony) that according to the most sure sect of our religion I lived a Pharisee.

English Revised Version
having knowledge of me from the first, if they be willing to testify, how that after the straitest sect of our religion I lived a Pharisee.

King James Bible
Which knew me from the beginning, if they would testify, that after the most straitest sect of our religion I lived a Pharisee.

World English Bible
having known me from the first, if they are willing to testify, that after the strictest sect of our religion I lived a Pharisee.

Young's Literal Translation
knowing me before from the first, (if they may be willing to testify,) that after the most exact sect of our worship, I lived a Pharisee;

Acts 26:5 Additional Translations ...