1 Corinthians 7:16
"For what knowest thou, O wife, whether thou shalt save thy husband? or how knowest thou, O man, whether thou shalt save thy wife?"
Cross References (ranked by relevance)
Romans 11:14
If by any means I may provoke to emulation them which are my flesh, and might save some of them.
1 Corinthians 9:22
To the weak became I as weak, that I might gain the weak: I am made all things to all men, that I might by all means save some.
1 Timothy 4:16
Take heed unto thyself, and unto the doctrine; continue in them: for in doing this thou shalt both save thyself, and them that hear thee.
Luke 15:10
Likewise, I say unto you, there is joy in the presence of the angels of God over one sinner that repenteth.