وَعَنْ مُحَمَّدِ بْنِ الْحَسَنِ رَحِمَهُ اللهُ أَنَّهُ قَالَ: يُنْزَحُ مِنْهَا مِائَتَا دَلْوٍ إِلَى ثَلَاثِ مِائَةٍ
Translation: It is reported from Muhammad ibn al-Hasan that 200 to 300 buckets should be withdrawn.
This concerns a continuously replenished well. Muhammad’s report gives a numerical solution, whereas the preceding method uses an amount equal to the well’s current volume.
Both address the difficulty of a well that cannot literally be emptied.