Here’s a Native American blessing, good for reading and adapting for any sacred occasion. It’s not a bad prayer to actually whisper to yourself before you start writing or presenting your wedding toast!

O Great Spirit, whose breath gives life to the world, and whose voice is heard in the soft breeze:
We need your strength and wisdom.
Cause us to walk in beauty.
Give us eyes ever to behold the red and purple sunset.
Make us wise so that we may understand what you have taught us.
Help us learn the lessons you have hidden in every leaf and rock.
Make us always ready to come to you with clean hands and steady eyes, so when life fades, like the fading sunset, our spirits may come to you without shame.

–from this webpage of wedding toasts and prayers.