Abu Saʿid Al-Khudri told my father, "I see you liking sheep and the wilderness. So whenever you are with your sheep or in the wilderness and you want to pronounce Adhan for the prayer raise your voice in doing so, for whoever hears the Adhan, whether a human being, a jinn or any other creature, will be a witness for you on the Day of Resurrection." Abu Saʿid added, "I heard it (this narration) from Messenger of Allah ﷺ." (Using translation from Bukhārī 609)   

إِنِّي أَرَاكَ تُحِبُّ الْغَنَمَ وَالْبَادِيَةَ فَإِذَا كُنْتَ فِي غَنَمِكَ وَبَادِيَتِكَ فَأَذَّنْتَ بِالصَّلَاةِ فَارْفَعْ صَوْتَكَ بِالنِّدَاءِ؛ فَإِنَّهُ لَا يَسْمَعُ مَدَى صَوْتِ الْمُؤَذِّنِ جِنٌّ وَلَا إِنْسٌ وَلَا شَيْءٌ إِلَّا شَهِدَ لَهُ يَوْمَ الْقِيَامَةِ قَالَ أَبُو سَعِيدٍ سَمِعْتُهُ مِنْ رَسُولِ اللهِ ﷺ  

[Machine] The Messenger of Allah ﷺ said to Bilal, "O Bilal, when you make the call to prayer, stand straight and recite it clearly. And when you establish the prayer, hold it with care. And place between your call to prayer and the start of the prayer the time it takes for a person to finish their meal, the time it takes for a person to finish drinking, and the time it takes for a person to relieve themselves. And do not stand up for prayer until you see me like this."  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ لِبِلَالٍ يَا بِلَالُ إِذَا أَذَّنْتَ فَتَرَسَّلْ وَإِذَا أَقَمْتَ فَاحْذِمْ وَاجْعَلْ بَيْنَ أَذَانِكَ وَإِقَامَتِكَ قَدْرَ مَا يَفْرُغُ الْآكِلُ مِنْ أَكْلِهِ وَالشَّارِبُ مِنْ شُرْبِهِ وَالْمُعْتَصِرُ إِذَا دَخَلَ لِقَضَاءِ حَاجَتِهِ وَلَا تَقُومُوا حَتَّى تَرَوْنِي هَكَذَا  

[Machine] Umar ibn al-Khattab said to me, "When you hear the call to prayer, stand up and proceed (to the prayer place), and when you establish the prayer, be cautious."  

قَالَ لِي عُمَرُ بْنُ الْخَطَّابِ إِذَا أَذَّنْتَ فَتَرَسَّلْ وَإِذَا أَقَمْتَ فَاحْدِرْ  

[Machine] He used to send the call to prayer and prepare for establishing it.  

أَنَّهُ كَانَ يُرْسِلُ الْأَذَانَ وَيَحْذِمُ الْإِقَامَةَ