ك َما سَتَشْرَبُ كَمِيَّةً مَحدُودَةً مِنَ الماءِ كُلَّ يَومٍ: سُدْسَ وِعاءٍ تَشرَبُهُ عَلَى فَتَراتٍ.
And the water you drink each day will be enough to fill a bottle. You will drink it from time to time.