Jamieson, Fausset and Brown on 1 Corinthians 7:24

24. abide with God--being chiefly careful of the footing on which he stands towards God rather than that towards men. This clause, "with God," limits the similar precept in 1Co 7:20. A man may cease to "abide in the calling wherein he was called," and yet not violate the precept here. If a man's calling be not favorable to his "abiding with God" (retaining holy fellowship with Him), he may use lawful means to change from it (compare Note, see on 1Co 7:21).