'Joint heirs' in the Bible

And if children, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with him, that we may be also glorified together.

Ye husbands, in like manner, dwell with your wives according to knowledge, giving honor unto the woman, as unto the weaker vessel, as being also joint-heirs of the grace of life; to the end that your prayers be not hindered.