What is the ruling in Islam regarding a group of friends, committed to prayer and reciting the Qur'an, watching pornographic films and images, with the possibility of this occurring during Ramadan?

You must advise your friends and remind them of Allah and the impermissibility of watching pornography and forbidden films, for sins blacken the heart. One must hasten to repent and abandon these acts of disobedience that lead to Allah’s displeasure and the corruption of the heart. Becoming addicted to looking at forbidden things may lead to zina (fornication/adultery) and liwat (sodomy). If they do not respond to the advice, you must part ways with them and abandon their friendship. If this occurs in Ramadan, the sin is greater and may lead to breaking the fast through the emission of semen (maniy) or prostatic fluid (madhiy), which is among the major sins.