The groom's supplication on the wedding night or when buying an animal

when you marry a woman or buy a maidservant, you should say: ‘O Allah, I ask You for the goodness within her and the goodness that you have made her inclined towards, and I take refuge with You from the evil within her and the evil that you have made her inclined towards.’…and if you buy a camel, then you should take hold of it’s hump and say likewise.’