The Apache Wedding Prayer/Blessing is used most often with outdoor ceremonies. During the prayer I (Michael) am often asked to play Shaikohachi (which I play in a Native American style) as a peaceful background music.
Many versions of the prayer are available, and here’s a nice common excerpt.
Now you will feel no cold - for each of you will be warmth to the other.
Now you will feel no pain - for each will be comfort to the other.
Now there is no more loneliness - for each of you will be companion to the other.
Now you are two bodies, but there is only one life before you.
May beauty surround you both in the journey ahead and through all the years.
May happiness be your companion and may your days together be good and long.