﴿ فَكُلِى وَٱشْرَبِى وَقَرِّى عَيْنًۭا ۖ فَإِمَّا تَرَيِنَّ مِنَ ٱلْبَشَرِ أَحَدًۭا فَقُولِىٓ إِنِّى نَذَرْتُ لِلرَّحْمَٰنِ صَوْمًۭا فَلَنْ أُكَلِّمَ ٱلْيَوْمَ إِنسِيًّۭا ﴾

“Eat, then, and drink, and let thine eye be gladdened! And if thou shouldst see any human being, convey this unto him: `Behold, abstinence from speech have I vowed unto the Most Gracious; hence, I may not speak today to any mortal.”

But in the matter of their actual use the order was reversed i.e. eating was enjoined first and then drinking. It is perhaps because normally a person first makes arrangement for drinking water and then for food, specially such food as is more likely to produce thirst. But when it comes to their use the sequence gets reversed i.e. one eats first and then drinks water. (Ruh ul-Ma ani).