While I was a companion rider with the Prophet ﷺ he said, "O Muʿadh!" I replied, "Labbaik wa Saʿdaik." He repeated this call three times and then said, "Do you know what Allah's Right on His slaves is?" I replied, "No." He said, Allah's Right on His slaves is that they should worship Him (Alone) and should not join partners in worship with Him." He said, "O Muʿadh!" I replied, "Labbaik wa Saʿdaik." He said, "Do you know what the right of (Allah's) salves on Allah is, if they do that (worship Him Alone and join none in His worship)? It is that He will not punish them." (another chain through Mu'adh)
أَنَا رَدِيفُ النَّبِيِّ ﷺ فَقَالَ يَا مُعَاذُ قُلْتُ لَبَّيْكَ وَسَعْدَيْكَ ثُمَّ قَالَ مِثْلَهُ ثَلاَثًا هَلْ تَدْرِي مَا حَقُّ اللَّهِ عَلَى الْعِبَادِ أَنْ يَعْبُدُوهُ وَلاَ يُشْرِكُوا بِهِ شَيْئًا ثُمَّ سَارَ سَاعَةً فَقَالَ يَا مُعَاذُ قُلْتُ لَبَّيْكَ وَسَعْدَيْكَ قَالَ هَلْ تَدْرِي مَا حَقُّ الْعِبَادِ عَلَى اللَّهِ إِذَا فَعَلُوا ذَلِكَ أَنْ لاَ يُعَذِّبَهُمْ حَدَّثَنَا هُدْبَةُ حَدَّثَنَا هَمَّامٌ حَدَّثَنَا قَتَادَةُ عَنْ أَنَسٍ عَنْ مُعَاذٍ بِهَذَا