We were traveling with Messenger of Allah ﷺ and he was fasting, and when the sun set, he said to (someone), "Get down and mix Sawiq with water for us." He replied, "O Messenger of Allah ﷺ! (Will you wait) till it is evening?" The Prophet ﷺ again said, "Get down and mix Sawiq with water for us." He replied, "O Messenger of Allah ﷺ! It is still daytime." The Prophet ﷺ said again, "Get down and mix Sawiq with water for us." So, he got down and carried out that order. The Prophet ﷺ then said, "When you see night falling from this side, the fasting person should break his fast," and he beckoned with his finger towards the east.  

سِرْنَا مَعَ رَسُولِ اللَّهِ ﷺ وَهْوَ صَائِمٌ فَلَمَّا غَرَبَتِ الشَّمْسُ قَالَ انْزِلْ فَاجْدَحْ لَنَا قَالَ يَا رَسُولَ اللَّهِ لَوْ أَمْسَيْتَ قَالَ انْزِلْ فَاجْدَحْ لَنَا قَالَ يَا رَسُولَ اللَّهِ إِنَّ عَلَيْكَ نَهَارًا قَالَ انْزِلْ فَاجْدَحْ لَنَا فَنَزَلَ فَجَدَحَ ثُمَّ قَالَ إِذَا رَأَيْتُمُ اللَّيْلَ أَقْبَلَ مِنْ هَا هُنَا فَقَدْ أَفْطَرَ الصَّائِمُ وَأَشَارَ بِإِصْبَعِهِ قِبَلَ الْمَشْرِقِ