Here is a reading that rings true to  me– there are plenty more on hand for you to choose from.

Sample Wedding Reading

Now you will feel no rain,
For each of you will be shelter to the other.

Now you will feel no cold,
For each of you will be warmth to the other.

Now there is no more loneliness for you.
For each of you will be companion to the other.

Now you are two bodies,
But there is only one Life before you.

Go now to your dwelling place,
To enter into the days of your togetherness.

And may your days be good and long upon the earth

1. Benediction of the Apaches—Unknown

Copyright is an important consideration, the following from the Attorney General’s website is adhered to.

Reading or reciting an extract from a book

Reading or reciting a reasonable portion of a published literary or dramatic work in public (provided the work is acknowledged) is an exception to copyright, and no permission needs to be obtained.

also

it is important to note that reproducing a literary or dramatic work on a printed order of service (as opposed to merely reciting it) requires the permission of the copyright owner (author or publisher).

This is the relevant link

http://www.ag.gov.au/www/agd/agd.nsf/Page/RWPBB7B93D8B673649BCA2571B10002EDF7