1 Corinthians 7:37

But the man who is firmly established in his heart and under no constraint, with control over his will and resolve in his heart not to marry the virgin, he will do well.

Note Literally in his heart to keep the virgin or in his heart to keep the betrothed

Nevertheless he that standeth stedfast in his heart, having no necessity, but hath power over his own will, and hath so decreed in his heart that he will keep his virgin, doeth well.

But he who stands steadfast in his heart, having no urgency, but has power over his own will, and has determined in his own heart to keep his own virgin, does well.

But he that standeth stedfast in his heart, having no necessity, but hath power as touching his own will, and hath determined this in his own heart, to keep his own virgin daughter, shall do well.