The first occurrence.
And if your brother has waxed poor, and fallen in decay with you; then you shall relieve him: yes, though he is a stranger, or a sojourner; that he may live with you. Lev 25:35
In the Scripture Pic: … that my footsteps may not slip.
The primitive root.
Strong’s H4131 מוט mowt, a primitive root meaning, “to totter or shake.” The 3-letter root is mem + vav + tet.
mem מ, ם = the water, thus chaos, mighty, blood
vav ו = the tent peg, thus add, secure, hook
tet ט = the basket, thus surround, contain, hold, mud
The story: Mem (water) added (vav) within (tet, as a basket’s contents are contained within it). One of the cognate words from this root is a green branch, as a green branch contains water within it. Something green is still flexible; it can be shaped to the desired shape and then left to dry. Once the water is removed it is no longer flexible, it retains its shape, or becomes unmoving. To be moved is to be shaken as a green branch is shaken in the wind.