John Gill Commentary Ephesians 1:16

"cease not to give thanks for you, making mention [of you] in my prayers;" — Ephesians 1:16 (ASV)

Cease not to give thanks for you
On account of their faith and love; which were gifts of grace bestowed upon them, and not the produce of their own free will and power; and therefore thanks are given to God for them:

making mention of you in my prayers ;
which shows the apostle to be a praying person, and that he was constant at the throne of grace, where he prayed for others as well as for himself; and it points out the time and way, when, and in which he gave thanks to God for them; and is mentioned, not only to testify his great affection for them, but also to excite them, by his example, to the practice of those duties themselves.