1 Peter 3:7
Likewise, husbands, live with your wives in an understanding way, showing honor to the woman as the weaker vessel, since they are heirs with you of the grace of life, so that your prayers may not be hindered.Life is hard, whether you are married or not. There are certain challenges that affect single missionaries and certain challenges that affect married ones. You know that we happen to be married! Pray that our marriage will be healthy and strong!
from "30 Ways to Pray for Missionaries," compiled by Elaine Helms for the NAMB. (the full list in pdf form is available here)