There is no god beside God

Our god is one and the same god; we shall all submit to Him

[47:19] You shall know that: "There is no other god beside GOD," and ask forgiveness of your sins and the sins of all believing men and women. GOD is fully aware of your decisions and your ultimate destiny.

God Almighty decrees the same religion for all the human beings.  He commands us not to divide the religion.

[42:13] He decreed for you the same religion decreed for Noah, and what we inspired to you, and what we decreed for Abraham, Moses, and Jesus: "You shall uphold this one religion, and do not divide it." The idol worshipers will greatly resent what you invite them to do. GOD redeems to Himself whomever He wills; He guides to Himself only those who totally submit.

And, God consistently decrees the same correct shahadah (statement of faith) in all scriptures for all of us. 

You shall have no other god besides Me." (Exodus 20:3)

I am the First and I am the Last; Besides Me there is no god." (Isaiah 44:6)

You shall know that "There is no other god besides God." (Quran 47:19)

Please note that the name of Moses, Jesus or Muhammad is not attached to any of the above shahadah, and no distinction is made among messengers.

[2:136] Say, "We believe in GOD, and in what was sent down to us, and in what was sent down to Abraham, Ismail, Isaac, Jacob, and the Patriarchs; and in what was given to Moses and Jesus, and all the prophets from their Lord. We make no distinction among any of them. To Him alone we are submitters."

[2:285] The messenger has believed in what was sent down to him from his Lord, and so did the believers. They believe in GOD, His angels, His scripture, and His messengers: "We make no distinction among any of His messengers." They say, "We hear, and we obey. Forgive us, our Lord. To You is the ultimate destiny."

[3:84] Say, "We believe in GOD, and in what was sent down to us, and in what was sent down to Abraham, Ismail, Isaac, Jacob, and the Patriarchs, and in what was given to Moses, Jesus, and the prophets from their Lord. We make no distinction among any of them. To Him alone we are submitters."

[4:152] As for those who believe in GOD and His messengers, and make no distinction among them, He will grant them their recompense. GOD is Forgiver, Most Merciful.

God teaches us in the Quran that all human beings learned the same correct shahadah long before coming to this world, and the purpose is stated clearly.

[7:172] Recall that your Lord summoned all the descendants of Adam, and had them bear witness for themselves: "Am I not your Lord?" They all said, "Yes. We bear witness." Thus, you cannot say on the Day of Resurrection, "We were not aware of this."

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