Genesis 17:4-10-25 As for me, behold, my Covenant is with thee, and thou shalt be a Father of many Nations ( Christians Muslims and Jews).

Genesis 17:10
This is my covenant, which ye shall keep, between Me and You and thy Seed after thee; Every man child among you shall be Circumcised.

 

 

Genesis 17:25

And Ishmael his son was thirteen years
when he was Circumcised in the flesh of his foreskin.

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Psalms 89:34 
My Covenant will I not Break, nor Alter the Word that is gone out of My lips.