Libation

Indeed, they had never passed the grotto without leaving some token of respect. In the morning when they led their flocks to pasture, and again in the evening ere they started home, they paid worship to the Deities, and presented either a flower, a green bough, some fruit, or a libation of milk, as an offering; and this piety, as we shall see presently, had its reward.

Source: tatoeba (6212617)

So spake the Queen, and on the festal board / the prime libation to the gods outpoured, / then lightly to her lips the goblet pressed, / and gave to Bitias. Challenged by the word, / he dived into the brimming gold with zest, / and quaffed the foaming bowl, and after him, the rest.

Source: tatoeba (6800343)

While we to Jove the pure libations pay, Than Jove what apter claims the hallow'd lay?

Source: wiktionary

[…] watching you, the waiters, not quite making eye-contact but scanning for any little way to be of service, plus plum-jacketed sommeliers walking around to see if you need a non-buffet libation…

Source: wiktionary