فَرَجَعَ مُوسَىٰ إِلَىٰ قَوْمِهِ غَضْبَانَ أَسِفًا ۚ قَالَ يَا قَوْمِ أَلَمْ يَعِدْكُمْ رَبُّكُمْ وَعْدًا حَسَنًا ۚ أَفَطَالَ عَلَيْكُمُ الْعَهْدُ أَمْ أَرَدتُّمْ أَن يَحِلَّ عَلَيْكُمْ غَضَبٌ مِّن رَّبِّكُمْ فَأَخْلَفْتُم مَّوْعِدِي (86)
(20:86) Moses returned to his people in a state of anger and grief. Reaching there, he said, "O my people, did not your Lord make good promises with you ? *64 Had a long time passed since those promises were fulfilled? *65 Or did you want Allah's wrath to come down upon you that you went against your Covenant with me? " *66
*64) That is, "Did not Allah fulfil the promises He made with you of showing His favours to you? For instance, He safely brought you out of Egypt and not only freed you from the slavery of your enemy but also destroyed him totally. He provided you with provisions in the desert and in the mountainous regions." It may also be translated like this: "Did not Allah make a good promise with you?" In that case, it will mean: "He made a promise that he will give you the Law and Guidance: was this not a good promise for your well being and betterment?"
*65) That is,"Had a long time passed since those great favours were done to you that you forgot them? Had long ages passed since you were afflicted with persecution by your enemy that you committed such a blasphemy?" It may also be translated like this : Had you to wait for a long time for the fulfilment of God's promise .that you became so impatient?" In that case, the meaning is obvious: "You had not to wait for a long time to see the fulfillment of the promise of Guidance. Therefore there was no excuse for what you did."
*66) This Covenant was the one which every community makes with its Prophet and promises that it will steadfastly follow the Guidance brought by him and will not worship anyone except Allah.