[14].Surah Ibrahim {A.S} [Abraham (PBUH)]: Ayat 37

Ayat 37. "O our Lord! I have made some of my offspring to dwell in an uncultivable valley by Your Sacred House (the Kabah at Makkah); in order, O our Lord, that they may perform As-Salat (Iqamat-as-Salat), so fill some hearts among men with love towards them, and (O Allah) provide them with fruits so that they may give thanks.  

Hazrat Abud-Darda' (May Allah be pleased with him)reported: I heard the Messenger of Allah  [SAWW](PBUH) saying, "If three men in a village or in the desert, make no arrangement for Salat in congregation, Satan must have certainly overcome them. So observe Salat in congregation, for the wolf eats up a solitary sheep that stays far from the flock.''

[Abu Dawud Hadith # 547]. 

Lesson : as mentioned above in Surah Ibrahim {A.S} Ayat 37. "O our Lord, that they may perform As-Salat (Iqamat-as-Salat), so fill some hearts among men with love towards them" This Hadith also stresses the importance of offering Salat in congregation and mentions the disadvantages of offering it individually. One who remains aloof from the congregation, is like the sheep which is separated from its herd and becomes a victim of the wolf. One who lives alone is easily overpowered by satanic doubts.