Following The Bible
I am not going into detail why the Quran does not accept the whole of the Bible as the revelation given to the Messengers of Allah, suffice to say at this point that the Quran is to be used to confirm what truths still exist from the revelation in the Bible. What is in the Quran is all we need.
Those who want to do a physical ritual prayer or circumcise themselves physically must castrate themselves intellectually from the Quran which clearly tells us not to follow the Jews and the Christians, aka the Bible; they will divert you from the Quran!
2:119 We have sent you (O Prophet) with the Decisive Truth as a bearer of glad tidings and as a warner. But you will not be questioned about the companions of the blazing fire. [13:40. Jaheem = Blazing fire = Insurmountable Barrier to the development of the human ‘self’ = Figuratively, Hell. The human ‘self’ can make progress only by accepting Divine Laws and doing good to God’s creations. See the author's note at the end of this rendition for an understanding of Self-actualization, Afterlife, Paradise and Hellfire]
2:120 Yet, never will the Jews be pleased with you, nor will the Christians, unless you follow their form of religion. Say, “God’s Guidance - it is the only Guidance.” And if you follow their wishes and errant views after the Knowledge that has come to you, then you will find no ally or helper against God. [7:3, 10:109, 13:37. It is not a matter of my religion or your religion. Al-Qur’an is the updated, unadulterated Message from the same Creator Who revealed the previous Scriptures]
2:121 Those to whom We have given the Book study and follow it as it should be studied and followed. They are the ones who truly believe in it. And whoever rejects it, such are the losers. [10:58]
Allah would not tell us to follow the practices of Abraham and then tell us not to follow the Jews unless He knew that what they had was a corruption of what He had originally given to Abraham and the other Messengers. Hence, the intellectual castration.
Other Creeds, Practices from outside of the Quran?
The Quran says it has all we need to practice our deen:
5:3 Forbidden to you (for food) are:
Carrion, blood, the flesh of swine, anything (not just meat) that has been dedicated to any other than God (such as an idol, grave or saint), any animal that has been strangled to death, or beaten to death, or killed by fall, or gored to death, or eaten by a wild animal unless you are able to slaughter it while it is still alive, and (also forbidden is) what is slaughtered on idolatrous altars (devotional stones or blocks in shrines considered sacred). And (you are forbidden) from dividing one another’s portions through raffling, for these are deviations. This Day, the rejecters have lost all hope of (making bargains in) your System of Life. Do not fear them, but fear Me. THIS DAY, I HAVE PERFECTED YOUR DEEN (LAWS) FOR YOU, COMPLETED MY FAVOR UPON YOU, AND CHOSEN FOR YOU AL-ISLAM AS THE SYSTEM OF LIFE. If anyone is forced by dire necessity (to consume the forbidden), with no intention of transgression, (should remember that) God is Forgiving, Merciful. [Mayitah = Carrion = Dead meat = An animal that dies of itself. Azlaam = Dividing eating portions by picking or shooting arrows = In other contexts Azlaam also includes the conjecture of foretelling the future = Raffle = Lottery = Divining arrows = Clairvoyance = Dividing things or time for one another through randomly picking up slips of paper. Deen = System of Life = The laws. 2:173, 2:185, 2:219, 5:90]
When you have a completed Deen, way of life, this does not need another set of rituals found in the Bible based upon a mistaken belief in the creed of Abraham in this way.
When we read creed of Abraham in the Quran we must look in the Quran for what Abraham did in 'his' creed.