Midrasz do Psalmów 110:2

2 "And say to Aaron take your staff. There it is written, a staff of Your Strength G-d shall send forth from Zion" (Psalms 110:2). The Holy One, Source of all Blessing is He, does not discipline the wicked except with a staff. And why is this? Because [the wicked] are compared to dogs. As it says "And they return each evening, crying out like dogs" (Psalms 59:15). As it is normal to strike a dog with lashes, so too they [the wicked] are lashed.. For this it is said "The staff of Your Strength." G-d said to them [Moses and Aaron]: 'Pharaoh is wicked. If he asks you "give us a sign," strike him with the staff' as it says "Say to Aaron: 'take your staff'"

23 "And the staff of Aharon" (Numbers 17:21). Some say that it is the staff that was in the hand of Yehudah, as it is stated (Genesis 17:23), "and the staff in your hand." And some say that it is the staff that was in the hand of Moshe. And it blossomed on its own, as it is stated (Numbers 17:23), "behold the staff of Aharon sprouted." And some say that Moshe took one beam, cut it into twelve boards and said to them, "All of you, take your stick from one source." And for what did he do this? "It is honorable for a man to desist from strife, but every fool becomes embroiled" (Proverbs 20:3) - so that they not say, "His stick was damp and [so] flowered." And the Holy One, blessed be He, decreed about the stick; and the explicit name [of God] that was on the diadem (tsits) was upon it, as it is stated (Numbers 17:23), "and a flower came out and it blossomed a blossom (tsits)." And it flowered at night and made a fruit. "And it put out (yigmol) almonds (shekedim) - it granted good (gamal) upon anyone who was constant (shakad) with the tribe of Levi. Why almonds and not pomegranates or nuts? Because Israel was compared to them. And that staff was in the hand of each and every king until the Temple was destroyed and it was hidden. And this staff will be in the hand of the king Messiah in the future, quickly in our days - as it is stated (Psalms 110:2), "The Lord will stretch forth from Zion your mighty staff; hold sway over your enemies."

Another explanation. “May He send your aid from His sanctuary, and may He support you from Zion.” (Psalms 20:3) R’ Levi said: all the good and blessings and consolation which the Holy One will give to Israel in the future only come from Zion. Salvation is from Zion, as it says “O that the salvation of Israel would come out of Zion…” (Psalms 14:7) Might is from Zion, as it says “The staff of your might the Lord will send from Zion…” (Psalms 110:2) Blessing is from Zion, as it says “May the Lord bless you from Zion…” (Psalms 134:3) The shofar’s blast is from Zion, as it says “Sound a shofar in Zion…” (Yoel 2:1) Dew, blessing and life are from Zion, as it says “As the dew of Hermon which runs down on the mountains of Zion, for there the Lord commanded the blessing, life forever.” (Psalms 133:3) Torah is from Zion, as it says “…for out of Zion shall the Torah come forth…” (Isaiah 2:3) Help and assistance are from Zion, as it says “May He send your aid from His sanctuary…” from the sanctity of the acts which you have done “…and may He support you from Zion,” (Psalms 20:3) from the distinguished actions which you have done. The Holy One said to Moshe: go and tell Israel ‘my son, just as I am separate, so too you be separate. Just as I am holy, so too you be holy.’ This is what is written “You shall be holy…” (Leviticus 19:2)