Is it permissible to worship the Noble Qur’an, or the Hand of Allah, or His Face, based on the saying that the Qur’an is part of the Divine Essence? And if I do not worship it out of caution against doubtful matters, will I be considered a disbeliever?

The Qur'an is the uncreated word of Allah, and it is one of His attributes, not a part of Him. As for worshipping an attribute alone, such as saying: "O Word of Allah, have mercy on me," this is polytheism (shirk) and disbelief (kufr) by the unanimous agreement of Muslims. This is because an attribute does not act on its own; rather, it is Allah, the One described by these attributes, who is worshipped. It is permissible to ask Allah and seek intercession with Him through His attributes, such as saying: "I ask You by Your knowledge."