This water libation is not explicitly mentioned in Torah but it is a law revealed to Moshe on Sinai to which the Sages have found allusions in the Torah. The Water Libation was performed with intense joy. The festivities were held in the Ezrat Nashim, which was the courtyard of the outer Temple. Though a relatively small area, miracously, many thousands of happy people were able to crowd in. There was dancing and singing in celebration of the drawing of the water.
Water requires neither planting nor reaping or pressing no purifying.
Let it be joined with the wine libation, which requires all sorts of preparations. In my eyes, your wine and water are equal, those that require great effort and those that don't, so long as you rejoice in me without any mixture of foreign thoughts or ulterior motives. Through the water libation, the Jewish people knew that all their exertion in the service of G-d throughout the year rises to be accepted by him.