Narrated Mu'adh bin Jabal: that the Messenger of Allah (ﷺ) said: "Do you know what Allah's right upon His slaves is?" I said: "Allah and His Messenger know best." He said: "His right upon them is that they worship Him alone and do not associate any partners with Him." He said: "And do you know what their right over Allah is if they do that?" I said: "Allah and His Messenger know best." He said: "That He will not punish them."
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا مَحْمُودُ بْنُ غَيْلاَنَ، حَدَّثَنَا أَبُو أَحْمَدَ، حَدَّثَنَا سُفْيَانُ، عَنْ أَبِي إِسْحَاقَ، عَنْ عَمْرِو بْنِ مَيْمُونٍ، عَنْ مُعَاذِ بْنِ جَبَلٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " أَتَدْرِي مَا حَقُّ اللَّهِ عَلَى الْعِبَادِ " . قُلْتُ اللَّهُ وَرَسُولُهُ أَعْلَمُ . قَالَ " فَإِنَّ حَقَّهُ عَلَيْهِمْ أَنْ يَعْبُدُوهُ وَلاَ يُشْرِكُوا بِهِ شَيْئًا " . قَالَ " فَتَدْرِي مَا حَقُّهُمْ عَلَيْهِ إِذَا فَعَلُوا ذَلِكَ " . قُلْتُ اللَّهُ وَرَسُولُهُ أَعْلَمُ . قَالَ " أَنْ لاَ يُعَذِّبَهُمْ " . هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ . وَقَدْ رُوِيَ مِنْ غَيْرِ وَجْهٍ عَنْ مُعَاذِ بْنِ جَبَلٍ .
sunnah.com