4. A number of our people have narrated from Ahmad ibn Muhammad ibn Khalid from Ali ibn Hassan al-Wasitiy from ‘Abd al-Rahman ibn al-Kathir who has said the following: “I once was with abu ‘Abd Allah . He (the Imam) mentioned Satan and called him greatly dangerous so much so that it frightened me and I said, ‘I pray to Allah to keep my soul in service for your cause, what is the way out from it?’ He (the Imam) said, ‘When you decide to go to bed with your wife say, “In the name of Allah, most Beneficent, most Merciful, who is the only Lord, the one who deserves worship and has invented the skies and earth. O Lord, if You have decided for me a successor this night, do not allow a share in him for Satan, or a portion, or benefit. Make him a believer, a sincere one and clean of Satan and his filth, Glorious is Your praise.’”