A.T. Robertson Commentary 1 Corinthians 7:38

"So then both he that giveth his own virgin [daughter] in marriage doeth well; and he that giveth her not in marriage shall do better." — 1 Corinthians 7:38 (ASV)

Doeth well (καλως ποιε). So Paul commends the father who gives his daughter in marriage (γαμιζε). This verb γαμιζω has not been found outside the N.T. See on Mt 22:30.

Shall do better (κρεισσον ποιησε). In view of the present distress (7:26) and the shortened time (7:29). And yet, when all is said, Paul leaves the whole problem of getting married an open question to be settled by each individual case.