Arpachshad was Shelah’s father, and Shelah was Eber’s father.
And Arphaxad begat Shelah, and Shelah begat Eber.
Arpachshad was the father of Shelah, Shelah of Eber.
And Arpachshad begat Shelah, and Shelah begat Eber.
Then Arphaxad conceived Shelah, who also himself conceived Eber.