When the Messenger of Allah (ﷺ) prayed, he began with himself and said: May the mercy of Allah be upon us and upon Moses. If he had patience, he would have seen marvels from his Companion. But he said: "(Moses) said: If ever I ask you about anything after this, keep me not in they company: then wouldst you have received (full) excuse from my side". Hamzah lengthened it.
In-book : Book 32, Hadith 16
English translation : Book 31, Hadith 3973