the Holy Qur'an

Glory to God, Who created in pairs all things that the earth produces, as well as their own (human) kind and (other) things of which they have no knowledge. (36:36)

That has created pairs in all things, and has made for you ships and cattle on which ye ride, (43:12)

And of every thing We have created pairs: That ye may receive instruction. (51:49)

End of Quotes