Talmud zu Bereschit 17:5

It was stated in the name of Rebbi Jehudah: The proselyte himself brings and makes the declaration⁷⁹Since this contradicts the statements of R. Jehudah in Tosephta 1:2, it is clear that the Tosephta was not known to the editors of the Yerushalmi.. What is the reason? (Gen. 17:5) “For I made you the father of the multitude of Gentiles.” In the past you were the father of Aram, from now onwards you will be father of all Gentiles. Rebbi Joshua ben Levi said, practice follows Rebbi Jehudah. A case⁸⁰About the prayers to be recited by proselytes. Since the Babli does not take up the problem, it agrees that the proselyte everywhere says “God of our forefathers.” came before Rebbi Abbahu and he instructed following Rebbi Jehudah.