What is the ruling on seeking help from friends for studying, knowing that they curse Allah and utter obscene language?

Slandering Allah the Almighty is an act of disbelief (kufr) that expels one from the fold of Islam. Obscene language is a sin and is not characteristic of believers. The Messenger of Allah, peace and blessings be upon him, said: "The believer is not one who slanders, or curses, or is obscene, or is foul-mouthed." One must beware of bad company, sever ties with them, seek out righteous students, and act upon the Prophet's advice: "Do not keep company except with a believer."