Stand up...
Stand up, as it is indeed your child and it did not come other than from either a blood-vein from you or from her.” He [Imam ‘Ali] (a.s.) said: “The man stood up and took the hand of his wife and his happiness with his wife and child increased.”[^8] 58. Imam al-Baqir (a.s.) said: “One of the of the Messenger of Allah (s.a.w.) came to him and said: “This is my uncle’s daughter and my wife. I know nothing but good about her.
She has given birth to a child from me and is extremely black with large nostrils, fuzzy hair and a flat nose. I know similar to him neither among my uncles nor my ancestors.
He (s.a.w.) asked the man’s wife: “What do you have to say?” She answered: “No, by He who has appointed you as a prophet in truth, I have never been with anyone else since he has taken me.” The Messenger of Allah (s.a.w.) cast down his head for a long while then he looked up at the sky, and then he turned to the man and said: “O man! There is no one that does not have between him and Adam ninety nine blood-veins [genes], and all of them effect in the descendents.
When the sperm arrives into the womb, the blood-veins start to move, and they ask Allah that the child be similar to them. Therefore, this is one of the roots that neither your ancestors nor the ancestors of your ancestors have conceived. Take your child.’ The woman said: “O Messenger of Allah! You have solved my problem!”[^9] 59. Imam al-Sadiq (a.s.) said: “Verily Allah has created four containers for the womb.
Whatever [sperm] comes into the first container is for the father, whatever comes into the second is for the mother, whatever comes into the third is for paternal uncles, and whatever comes into the fourth is for the maternal uncles.”[^10] 60. Imam al-Sadiq (a.s.) said: “When Allah the Exalted, the High, wishes to create someone, He gathers all the features between that person and up to [the time of] Adam, then He creates him on the feature of one of them.