I think this is a beautiful custom — the bride & groom saying their vows with their hands clasped on a crucifix, which represents the greatest love.
“As the priest tells the couple, “You have found your cross. It is a cross to be loved, to be carried — a cross not to be thrown away, but to be cherished.”
“After all, Jesus told us, “Whoever wishes to come after me must deny himself, take up his cross, and follow me” (Matthew 16:24).
“With these vows, the cross leads to salvation, to love and to blessings. But to abandon one’s wife or husband is to refuse and abandon the cross — and to abandon Jesus. That is a lasting lesson for married life.
You can read more here.
Image by the National Catholic Register.