Psalms 116:13

13.The cup of salvation He refers to a custom which was prevalent under the Law. For when they rendered solemn thanks to God, a feast was also appointed, at which, in token of their gladness, there was an holy libation. This being a symbol of their deliverance from Egyptian thraldom, is for that reason here called the cup of salvation (382) The term to call upon, signifies to celebrate the name of God; and this he expresses more plainly, subsequently, by saying that he would pay his vows in the assembly of the faithful, the sanctuary alone being the place where sacrifices could be offered. The amount is, that the faithful need not be greatly perplexed about the way of performing their duties, God not demanding from them a return which he knows they are unable to give, but being satisfied with a bare and simple acknowledgment. The proper return is to own our obligation to him for every thing. If God deal so kindly and mercifully with us, and we fail in giving to him the tribute of praise for our deliverance which he claims, then our supineness becomes the more base. And certainly they are unworthy of the enjoyment, I say not of the riches of the world, but of the light of the sun and the air by which we breathe and live, who would rob the Author of them of the small return which so legitimately belongs to him. The Mosaic ritual has indeed been abrogated, and along with it the external libation referred to by David, yet the spiritual service, as we found in Psalms 50:23, “The sacrifice of praise shall glorify me,” is still in force. Let us, however, bear in mind, that God is lawfully praised by us, when we offer in sacrifice not only our tongues, but also ourselves, and all that we possess. And this not because God derives any profit from it, but because it is reasonable that our gratitude should manifest itself in this way.

There was a libation of wine enjoined by the Mosaic law to be made in the temple every morning and evening for a drink-offering, (Numbers 28:7,) to which some suppose there is here a reference, observing, that the three last verses seem to intimate, that the Psalmist was now at the temple, offering the meat-offering, drink-offering, and sacrifices, to the Lord.