Is there anything in
any religious Holy Books which suggest parallel universes? Does your religion teach about parallel universes? Do you believe in parallel universes? Do you believe in parallel universes and therefore believe/deny the existence of God? Why do you think parallel universes exist?
and answers to any other questions relating to parallel universes you can think of!
In the Baha'i Writings it doesn't mention "parallel universes" by name but there is a concept called the "worlds of God" which are infinite...
As to thy question concerning the worlds of God. Know thou of a truth that the worlds of God are countless in their number, and infinite in their range. None can reckon or comprehend them except God, the All-Knowing, the All-Wise.
(Baha'u'llah, Gleanings from the Writings of Baha'u'llah, p. 151)
Verily I say, the creation of God embraceth worlds besides this world, and creatures apart from these creatures. In each of these worlds He hath ordained things which none can search except Himself, the All-Searching, the All-Wise. Do thou meditate on that which We have revealed unto thee, that thou mayest discover the purpose of God, thy Lord, and the Lord of all worlds. In these words the mysteries of Divine Wisdom have been treasured.
(Baha'u'llah, Gleanings from the Writings of Baha'u'llah, p. 152)
How could such Souls have consented to surrender themselves unto their enemies if they believed all the worlds of God to have been reduced to this earthly life? Would they have willingly suffered such afflictions and torments as no man hath ever experienced or witnessed?
(Baha'u'llah, Gleanings from the Writings of Baha'u'llah, p. 158)
Without truthfulness, progress and success in all of the worlds of God are impossible for a soul. When this holy attribute is established in man, all the divine qualities will also become realized.
(Abdu'l-Baha, Baha'i World Faith - Abdu'l-Baha Section, p. 384)
This is from a provisional translation of the Tablet of the Universe revealed by Abdul-Baha:
Praise be to God Who hath ever caused His Names and Attributes to
penetrate the degrees of existence; Who hath made the effects of those Names and Attributes to shine resplendent and their signs to be
firmly established in both the hidden and manifest worlds. By them He hath made the holy realities that are informed by His grace and are the recipients of His outpourings to be the sole revealers of all that pertaineth unto Him, and hath caused them to move through the firmament of perfection in arcs of descent and ascent.
(and)
For physical things are signs and imprints of spiritual things; every lower thing is an image and counterpart of a higher thing. Nay, earthly and heavenly, material and spiritual, accidental and essential, particular and universal, structure and foundation, appearance and reality and the essence of all things, both inward and outward -- all of these are connected one with another and are interrelated in such a manner that you will find that drops are patterned after seas, and that atoms are structured after suns in proportion to their capacities and potentialities. For particulars in relation to what is below them are universals, and what are great universals in the sight of those whose eyes are veiled are in fact particulars in relation to the realities and beings which are superior to them. Universal and particular are in reality incidental and relative considerations. The mercy of thy Lord, verily, encompasseth all things!