إِذِ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَدْ أَعْلَمَ أَنَّهُ عَمَلٌ صَالِحٌ، وَأَعْلَمَ أَنَّ لَوْلَا أَنْ يُغْلَبَ الْمُسْتَقِي مِنْهَا عَلَى الِاسْتِقَاءِ لَنَزَعَ مَعَهُمْ.
Because the Noble Prophet (peace be upon him) has stated that this is a righteous deed. And he also stated that if there was no fear of causing hardship to those who provide Zamzam, I too would have drawn water from the well along with them.