Is there also a devil with the congregation?
Answer:
No,
Allah Almighty says:
«وَاعْتَصِمُوا بِحَبْلِ اللَّهِ جَمِيعًا وَلَا تَفَرَّقُوا ۚ»
“And hold firmly to the rope of Allah all together and do not become divided.”
It is narrated from Urfajah (may Allah be pleased with him) that he said: I heard the Messenger of Allah (peace be upon him) say:
«يد الله على الجماعة، والشيطان مع من يخالف الجماعة»
“Allah’s hand is with the congregation, and the devil is with the one who opposes the congregation.”
Allama Albani (may Allah have mercy on him) declared its chain authentic in Sahih Sunan an-Nasa’i, Hadith number 3453.
It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with both of them) that he said the Messenger of Allah (peace be upon him) said:
«لو يعلم الناس ما فى الوحدة ما سار أحد وحده بلیل أبدا»
“If people knew the harm of being alone at night, no one would ever walk alone at night.”