“And on the second day [of Sukkot] ye shall present twelve young bullocks, two rams, fourteen he-lambs of their first year, without blemish; and their meal-offering and their drink-offerings for the bullocks, for the the rams, and for the lambs, according to their number, after the ordinance”
– Numbers 29:17-18, JPS 1917 Tanach
There are subtle hints, that are contained within the passage, whereof the offerings for the days of Sukkot are found. Regarding the phrase, “and their drink-offerings”, the word departs from the singular usage found in other verses. Other variations include v’niskeyhem (v. 31), spelled with an extraneous mem; and un’sacheyha, with an additional yud; also, k’mishpatam (v.33) with an extra mem. “These variations yield the three superfluous letters mem, yod, and mem, from veniskeiheM, unsakhEha, and kemishpataM, which together spell the Hebrew word for water [MaYiM]” (Taanit 2b:14, sefaria.org). Thus, through these clues, the Torah infers the requirement of the water offerings to accompany the other offerings on these days.
The water-offerings are known as Simchat Beis HaShoavah, Celebration of the Place of Water-Drawing. “Whoever did not see the rejoicing of [this water drawing ceremony] never saw rejoicing in his lifetime” (Mishnah: Sukkah 5:1). This refers to the rejoicing that occurred during the water drawing ceremony at the Temple, each and every day of Sukkot. This was the only time that water was poured out upon the mizbeach (altar). The Talmud associates this ceremony with a greater implication of a messianic nature, “Why is the name of it called the Drawing Out of Water? Because of the pouring out of the Ruach HaKodesh (Holy Spirit), according to what is said: ‘With joys shall ye draw water out of the wells of salvation’” (Isaiah 12:3). As is written elsewhere, confirming the pouring out of the Ruach: “I will pour out My spirit upon all flesh” (Joel 3:1, JPS 1917 Tanach).