May the grace of the Lord Jesus Christ wrap your 6 friends in his Holy Spirit and lead them out of the darkness that has caused them to even consider such a terrible idea. May the Lord give you the right words and wisdom to alter this course for the better so they do not go any further, and hopefully dial the hotline in the link above.
I pray that holy angels will be sent out to battle the dark forces coming against those six friends. I pray that the Lord will reach out to them and rescue them now, and for eternity.