Shri Ekanatha Charitam III Vol III Book VIII Chp 13 Shlokas 14 - 15
एकनाथ उवाच
गर्दभोsयं तृषार्तस्तु पतितो दृश्यते खलु |
अयं गन्तुं न शक्नोति चान्यत्र सलिलान्तिकम् ||
तस्माद्दातव्यमस्माभिरस्मै गङ्गाजलं त्विह |
एवं हि जीवकारुण्यं हरेराराधानं ननु ||
Shri Ekanatha said
This donkey is lying afflicted with unbearable thirst. He cannot go to a place where there is water. So, we should all give him the Ganga water we have. Showing sympathy to living beings is the true way of worshipping Lord Hari
