NASB 1995
since they have known about me for a long time, if they are willing to testify, that I lived as a Pharisee according to the strictest sect of our religion.

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 ...