I saw Ibn Umar holding his beard with his hand and cutting what exceeded the handful of it. He (Ibn Umar) said that the Prophet ﷺ said when he broke his fast: Thirst has gone, the arteries are moist, and the reward is sure, if Allah wills.  

وَقَالَ كَانَ رَسُولُ اللَّهِ ﷺ إِذَا أَفْطَرَ قَالَ ذَهَبَ الظَّمَأُ وَابْتَلَّتِ الْعُرُوقُ وَثَبَتَ الأَجْرُ إِنْ شَاءَ اللَّهُ  

The Prophet of Allah ﷺ used to say when he broke his fast: O Allah, for Thee I have fasted, and with Thy provision I have broken my fast.  

أَنَّ النَّبِيَّ ﷺ كَانَ إِذَا أَفْطَرَ قَالَ اللَّهُمَّ لَكَ صُمْتُ وَعَلَى رِزْقِكَ أَفْطَرْتُ