Josué 4:18 Midrash: Ein Yaakov (Glick Edition) & Shemot Rabbah

As soon as the last man of Israel ascended from the Jordan, the water of the Jordan returned to its place, as it is said (Josh. 4, 18) And it came to pass, when the priests that bore the ark of the covenant of the Lord came up out of the midst of the Jordan as soon as the soles of the priest's feet were drawn up unto the dry ground, that the waters of the Jordan returned unto their place, and flowed over all its banks, as aforetime. It is thus found that the ark and the priest, its bearer, was on one side of the Jordan and Israel was on the other side of the Jordan, hence the ark carried its own bearers and crossed the Jordan, as it is said (Ib., ib. 11) And it came to pass, when all the people had finished passing over the Jordan, that the ark of the Lord passed over it with the priests in the presence of the people. Concerning this it happened that Uzzah was punished, as it is said (II Sam. 6, 6) And when they came to the threshing floor of Nachon, Uzzah put forth his hand to the ark of God and took hold of it; for the oxen shook it. Thereupon the Holy One, praised be He, said unto Uzzah: "The Holy Ark carries its own bearers, how much the more could it carry itself!" Therefore (Ib., ib. 7)

“And you shall command,” that is what is written: “You would call and I would answer You, You would yearn [tikhsof] for Your handiwork” (Job 14:15). Regarding four matters the Holy One blessed be He longed for his handiwork. “Tikhsof” is nothing other than longing, as it is stated: “Because you longed [nikhsof nikhsafta]” (Genesis 31:30); “My soul longs [nikhsefa], indeed it pines” (Psalms 84:3). These are the four matters: The Holy One blessed be He bears [sovel] His world, as it is stated: “I have done and I will carry, I will bear [esbol] and I will rescue” (Isaiah 46:4), yet He commanded the sons of Kehat to bear Him, as it is stated: “But he did not give to the sons of Kehat, because the sacred service is upon them; they shall bear on the shoulder” (Numbers 7:9). Know, that, as it were, He bore them when they came to the Jordan, as it is stated: “The Jordan was overflowing all its banks” (Joshua 3:15), and the sons of Kehat were unable to cross. What did the Holy One blessed be He do? He bore them, as it is stated: “It shall be as the soles of the feet of the priests will rest” (Joshua 3:13). Rabbi Berekhya said: The Ark bears its bearers. The priests did not bear it, but rather, it bore them, as it is stated: “The soles of the feet of the priests were drawn up [onto dry ground]” (Joshua 4:18).
The Holy One blessed be He guards [meshamer] His world, as it is stated: “Behold, the Guardian of Israel neither slumbers nor sleeps. The Lord is your Guardian” (Psalms 121:4–5). And He said to Israel that they should guard Him, as it is stated: “And those encamped in front of the Tabernacle, to the east, in front of the Tent of Meeting: [Moses, and Aaron, and his sons, keeping [shomrim] the commission of the Sanctuary]” (Numbers 3:38). He illuminates the world, as it is written: “The earth shone with His glory” (Ezekiel 43:2). And He said of Israel: “They shall bring you pure olive oil.” That is, “yearn for Your handiwork.”