“Know yee, that our brother Timothie is set at libertie, with whom if he come shortly, I will see you.”
1611 King James Version (KJV)
13:23 If he come - To me.
Heb 13:23 [Our] brother Timothy is set at liberty. How intimately Timothy was associated with Paul all his epistles show. Timothy too joined him at Rome during his imprisonment. (See salutations of the so-called "Prison Epistles", Php 1:1 Col 1:1 Phm 1:1.) This language implies that Timothy had been arrested and afterwards set free. Of this imprisonment, or just where it occurred, there is no other history.