One example of a wish for someone's wedding is "Here's hoping that your marriage is a successful one." Another example is "Have a happy wedding and a blissful honeymoon!"
Well wishes for weddings may be light, deep or religious. One example of a deeper wedding wish is "To love and be loved is the pinnacle of happiness and riches. May you never lose sight of this precious treasure in all your days together."
A religious wedding wish is "Congratulations! God bless you today and for the rest of your married lives." Another wedding wish with religious connotations is "May the bloom of God’s blessings color your wedding with fruitfulness and conjugal peace. Happy Wedlock."
Some famous figures also have quotes about weddings that you can use in a card or speech to wish a couple well. One example of a wedding quote from a famous figure is "When you make a sacrifice in marriage, you’re sacrificing not to each other but to unity in a relationship," by Joseph Campbell.
Another example is "There is no more lovely, friendly and charming relationship, communion or company than a good marriage," by Martin Luther. Leo Tolstoy also said "What counts in making a happy marriage is not so much how compatible you are, but how you deal with incompatibility."