What is the Ruling Concerning Praying (Supplicating) to Other than Allah Like the Dead?
Praying to them is a major Shirk (polytheism).
Evidence from the Noble Qur'an
{Invoke not with Allah another ilaah (God) Lest you be among those who receive punishment}, {Soorah ash-Shu'araa, verse 213]
Evidence from the authentic Sunnah
((Whoever dies having called upon partners besides Allah shall enter Hellfire)), [Transmitted by al-Bukhaaree]