ENOfficial
Abu Huraira reported God's messenger as saying, “When you hear the cocks crowing ask God for some of His grace, for they have seen an angel; but when you hear an ass braying seek refuge in God from the devil, for it has seen a devil.” (Bukhari and Muslim.)
Source: sunnah.com
Other translations
Arabic
وَعَنْ أَبِي هُرَيْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِذَا سَمِعْتُمْ صِيَاحَ الدِّيَكَةِ فَسَلُوا اللَّهَ مِنْ فَضْلِهِ فَإِنَّهَا رَأَتْ مَلَكًا وَإِذَا سَمِعْتُمْ نَهِيقَ الْحِمَارِ فَتَعَوَّذُوا بِاللَّهِ مِنَ الشَّيْطَانِ الرَّجِيمِ فَإِنَّهُ رَأَى شَيْطَانا»
sunnah.com