​Service

No sooner does a Muslim serve a group of Muslims than Allah will give him servants equal in number [to the group] in Paradise.

رسولُ اللَّهِ صلى اللَّه عليه وآله :  خِدْمَةُ المؤمنِ لأخيهِ المؤمنِ دَرَجةٌ لا يُدْرَكُ فَضْلُها إلّا بمِثْلِها . مستدرك الوسائل : 12 / 429 / 14524 .

 The Prophet (SAWA) said, 'The service of a believer to his fellow believing brother is [worthy of] a station of which the reward and grandeur can only be perceived by returning the same service.' Mustadrak al-Wasa'il, v. 12, p. 429, no. 14524

رسولُ اللَّهِ صلى اللَّه عليه وآله :  أيُّما مُسلمٍ خَدَمَ قَوماً مِن المُسلمينَ إلّا أعْطاهُ اللَّهُ مِثْلَ عَدَدِهِم خُدّاماً في الجَنّةِ . الكافي : 2 / 207 / 1 .

 The Prophet (SAWA) said, 'No sooner does a Muslim serve a group of Muslims than Allah will give him servants equal in number [to the group] in Paradise.' al-Kafi, v. 2, p. 307, no. 1