Deuteronomy 23:25

23:25 When you go into the ripe grain fields of your neighbor you may pluck off the kernels with your hand, ¹  but you must not use a sickle on your neighbor’s ripe grain.

Deuteronomy 32:14

32:14 butter from the herd

and milk from the flock,

along with the fat of lambs,

rams and goats of Bashan,

along with the best of the kernels of wheat;

and from the juice of grapes you drank wine.

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¹ sn For the continuation of these practices into NT times see Matt 12:1-8; Mark 2:23-28; Luke 6:1-5.