Originally Posted by PurestAmbrosia

actually according to Jewish Laws the rights of inheritance whether of a covenant or otherwise, goes to the first born.. And the first son of Abraham PBUH and the one who was taken for the sacrifice is Ishmael.. Issac wasn't even born at the time.. why do you think Sara (P) wanted Hagar taken else where? she was barren!.. it was later that she came to conceive Abraham received gladtiding of Issac when Sara was of very old age... that is if we are to go purely by history not theology...
I hope that helps... I am sure someone here can offer you some sources, it is 1.18Am where I am not and can't dedicate to this with any justice...but hope it was of help?
peace and welcome to LI