5. Imam Ja’far Sadiq (a.s.) narrates that the Holy Prophet (s.a.w.s.) said, “When one of you supplicates it should be for everyone in general, because it a factor for acceptance of supplications.”
Al-Kāfi #1697“The Messenger of Allah has said, ‘Whenever anyone of you prays he should maintain inclusiveness (pray for everyone) in his prayer. This may...