If you are looking for an appropriate prayer or reading for your wedding or vow renewal, consider using the Apache Wedding Blessing, but know where it came from.
The growing consensus concerning the origin of the "Apache Wedding Blessing" is that the blessing/prayer is not part of Apache culture. It appears the "Apache Wedding Blessing" was written in the late 1940s or in early 1950 by screenwriter Albert Maltz for the movie Broken Arrow.

Other sources state that the blessing was freely adapted from "Wedding Braids" by Stan Davis. However Stan Davis appears to be an artist and "Wedding Braids" is one of his paintings.

Rebecca Mead: "But so far as I can determine from research in libraries, speaking with scholars of apache culture, and with actual keepers of Apache culture, the prayer appears to be a poetic fiction ... It was a Native American, Ramon Riley, the cultural resource director of the White Mountain Apache Cultural Center, in Fort Apache, Arizona, who pointed me toward the apparent source of the Apache wedding prayer. 'It's from a movie called Broken Arrow, starring James Stewart and Deborah Paget,' he told me."
Source: Rebecca Mead. One Perfect Day: The Selling of the American Wedding. 2007. pgs. 134-135.

Apache Wedding Blessing - Indian Marriage Prayer

Now you will feel no rain,
for each of you will be shelter for the other.
Now you will feel no cold,
for each of you will be warmth for the other.

Now there is no more loneliness.

Now you are two persons,
but there is only one life before you.

May your days together be good and long
upon the earth.