"When the Messenger of Allah departed he reined in his she-camel until its head touched the middle of his saddle, and he was saying to the people: 'Be tranquil be tranquil,' on the evening of Arafat." (Using translation from Nasāʾī 3019)
أَنَّهُ سَمِعَ ابْنَ عَبَّاسٍ يَقُولُ لَمَّا دَفَعَ رَسُولُ اللهِ ﷺ شَنَقَ نَاقَتَهُ حَتَّى إِنَّ رَأْسَهَا لَيَمَسُّ وَاسِطَةَ رَحْلِهِ وَهُوَ يَقُولُ لِلنَّاسِ «السَّكِينَةُ السَّكِينَةُ عَشِيَّةَ عَرَفَةَ»