Muaz bin Jabal reported,

I was riding behind the Prophet ﷺ on a donkey called Ufayr. He said, "Muaz, do you know what is Allah's right over His servants, and what is the servants' right upon Allah?"I replied, "Allah and His Messenger know best."He said, "Allah's right over the servants is that they worship Him and associate nothing with Him, and the servants' right upon Allah is that He will not punish anyone who does not associate anything with Him."I asked, "Messenger of Allah, shall I not give the people this good news?"He said, "Do not tell them, for they will rely upon it."

عن معاذ بن جبل قال

كنت ردف النبي ﷺ على حمار يقال له: عفير. قال: فقال: يا معاذ هل تدري حق الله على عباده، وما حق العباد على الله؟ قلت: الله ورسوله أعلم. قال: فإن حق الله على العباد يعبدوه ولا يشركوا به شيئا، وحق العباد على الله أن لا يعذب من لا يشرك به شيئا فقلت: يا رسول الله، أفلا أبشر به الناس؟ قال: لا تبشرهم فيتكلوا.