כִּ֤י תָבֹא֙ בְּקָמַ֣ת רֵעֶ֔ךָ וְקָטַפְתָּ֥ מְלִילֹ֖ת בְּיָדֶ֑ךָ וְחֶרְמֵשׁ֙ לֹ֣א תָנִ֔יף עַ֖ל קָמַ֥ת רֵעֶֽךָ׃ (ס)
When thou comest into thy neighbour’s standing corn, then thou mayest pluck ears with thy hand; but thou shalt not move a sickle unto thy neighbour’s standing corn.
Read kabbalistic (mystical) interpretation of Deuteronomy 23:26: and classical mystical sources.