Leviticus 25:5
Whatever reseeds itself (uncultivated) in your harvest you shall not reap, nor shall you gather the grapes from your uncultivated vine, it shall be a year of sabbatical rest for the land.
2 Kings 19:29
‘Then this shall be the sign [of these things] to you [Hezekiah]: this year you will eat what grows of itself, in the second year what springs up voluntarily, and in the third year sow and reap, plant vineyards, and eat their fruit.
Isaiah 37:30
“This shall be the sign [of these things] to you [Hezekiah]: you are to eat this year