Who were wives of Abel and Cain?

Believing in the existence of a Creator, and Unifying Him ([meaning Monotheism]), and believing in His Prophets and Messengers and their Vicegerents (a.s), and in the Justice and ordainment [of God] and predestination/fate and Bidaa’ and Heaven and Hell, and the infallibility of the Successors of Allah (a.s) in His Land, and the Angels, and the Unseen, and all that which the Prophets and Messengers and their Vicegerents (a.s) have informed about. And we do not have except that we hold tight to their tails and follow their footsteps. He, The Exalted, said: {If you love Allah , then follow me, [so] Allah will love you}