Commentaries:
Jamieson, Fausset, and Brown
faithfully—an act becoming a faithful man.
whatsoever thou doest—a distinct Greek word from the former "doest": translate, "workest": whatsoever work, or labor of love, thou dost perform. So Matthew 26:10, "She hath wrought a good work upon me."
and to strangers—The oldest manuscripts, "and that (that is, and those brethren) strangers." The fact of the brethren whom thou didst entertain being "strangers," enhances the love manifested in the act.
Other Jamieson, Fausset, and Brown entries containing 3 John 1:5:
Titus 1:8
3 John 1:1
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