Midrash su Salmi 94:1

Alternatively, "These days were formed, but not one from them" [Psalms 139:16] is refering to Yom Kippur for (the nation of) Israel. {continuing}

Another matter: “Your hair is like a flock of goats that streams down [shegaleshu] from Mount Gilad” (Song of Songs 4:1) – the mountain from whose midst you took away [shegelashten], I rendered a memorial for the nations of the world. Which is this? These are the priestly watches. What is it that you took away from its midst? “Your teeth are like a flock of ordered ewes” (Song of Songs 4:2) – defined matters, the twenty-four priestly watches, the twenty-four Levite watches, and twelve divisions.⁵⁴These were divisions of men who would come for a month at a time to perform whatever labors the king would assign them (Etz Yosef). “That have come up from bathing” (Song of Songs 4:2) – who protect Israel. “That are all paired” – as we learned there: At three times during the year all the priestly watches were equal (Sukka 55b). “And there is none missing among them” (Song of Songs 4:2) – as we learned: “The first, the head and the hind leg…” (Tamid 31a).⁵⁵Each of the priests had a role, and there were always enough priests to perform each task.
“Your lips are like a scarlet thread” (Song of Songs 4:2) – as we learned: [The High Priest] stooped to pour the libation, and the deputy waved the cloths, and ben Arza struck the cymbals (Tamid 33b).⁵⁶This was the sign for the Levites to begin their song in the Temple. “Your speech is lovely” (Song of Songs 4:2) – this is the song, as we learned there: The song that the Levites would recite in the Temple. On the first day they would recite: “The earth is the Lord’s and all it contains” (Psalms 24:1).⁵⁷The intention is that on Sunday the Levites would recite the entire chapter of Psalms beginning with this verse. The same is true for all of the citations cited here; one psalm was recited each day of the week. On the second day: “Great is the Lord and highly to be praised in the city of God…” (Psalms 48:2). On the third day: “God stands in the divine congregation” (Psalms 82:1). On the fourth day: “Lord God, to whom vengeance belongs, God to whom vengeance belongs, shine forth” (Psalms 94:1). On the fifth day: “Sing for joy to God, our strength; shout aloud to the God of Jacob” (Psalms 81:2). On the sixth day: “The Lord reigns: He is robed in majesty” (Psalms 93:1). On Shabbat they would recite: “A psalm, a song for the Shabbat day” (Psalms 92:1) – for the future, for the day that will be entirely Shabbat and rest for everlasting life.

Our Rabbis taught: Once in a certain place, a wild ass used to injure the people; so they came and informed R. Chanina b. Dosa. "Show me the cave where the animal is hidden," said he to them. Whereupon they went and showed him. He then placed the sole of his foot on the hole, and when the animal came forth he hit it and the animal fell dead. R. Chanina then took it on his shoulder and brought it to the academy, saying to them: "My sons, see it is not the wild ass that kills, but sin kills." They then all exclaimed, "Woe unto the man who is met by a wild ass, but woe unto the wild ass when it meets R. Chanina b. Dosa," R. Ami said, "Great is knowledge, for it is the first benediction in the week day's prayer." Further said R. Ami, "Great is knowledge for it is placed between two Divine names, as it is said (I. Sam. 2, 3.) A God of knowledge is the Lord. Mercy is to be denied to him who has no knowledge; for it is said (Is. 27, 11.) They are a people of no understanding , therefore he that maketh them will not have mercy on them." R. Elazar said: "Great is the Temple for it is placed between two Divine names, as it is written (Ex. 15, 17.) Thou hast wrought for Thee to dwell in, O Lord, the sanctuary, O Lord!" R. Elazar also said: "Every man who possesses knowledge is considered worthy to cause the Temple to be built in his days, for knowledge is placed between two Divine names, and the Temple is placed between two Divine names." He was questioned by R. Acha of Karchina: "According to your opinion, retaliation must also be of great value, for it is written (Ps. 94, 1.) O God of vengeance, Lord!" "Yea," he replied, "when necessary it is of course of great value," and thus is meant by the saying of Ulla, "Why is the word vengeance repeated? O God of vengeance. Lord! O God of vengeance! One for a good purpose and one for a bad purpose; for good, as it is written (Deu. 33, 2.) He shone forth from Mt. Paran; for bad, as it is written (Ps. 94, 1.) O God of vengeance, Lord! O God of vengeance, shine forth!"

(Devarim 33:2) "He appeared from Mount Paran": There are four "appearances." The first, in Egypt, viz. (Psalms 80:2) "Shepherd of Israel, hear, who leads Joseph as a flock; Dweller among the cherubs — appear." The second, at the giving of the Torah, viz. "He appeared from Mount Paran." The third, in the days of Gog and Magog, viz. (Psalms 94:1) "A G-d of vengeance is the L-rd — G-d of vengeance, appear!" The fourth, in the days of the Messiah, viz. (Ibid. 50:2) "From Zion, the quintessence of beauty, G-d appeared."