((ذَهَبَ الظَّمَأُ وَابْتَلَّتِ العُرُوقُ، وَثَبَتَ الْأَجْرُ إِنْ شَاءَ اللَّهُ)).
(The thirst has gone and the veins are quenched, and reward is confirmed, if Allah wills.)
Abu Dawud 2/306 and others. See also Al- Albani, Sahihul-Jami' As-Saghir 4/209.