“But ye know the proofe of him, That as a sonne with the father, hee hath serued with me, in the Gospel.”
1611 King James Version (KJV)
2:22 As a son with his father - He uses an elegant peculiarity of phrase, speaking partly as of a son, partly as of a fellowlabourer.
Php 2:22 Ye know the proof of him. You have seen him and know him. Timothy had more than once visited Philippi before this (2Co 2:9 13:3). As a son with the father. Timothy was his convert, and showed him a tender reverence.