Sheath, coat, or spathe
AI kumm is a container, vessel, sheath, coat, or spathe: pI. ‘akmām. ‘Akmamu al-zar’ are vessels from which buds or fruits come. Akmam al-nakhl is the fiber covering the core of a palm tree, the container surrounding the female inflorescence and grains of the palm tree. Before its appearance, the female inflorescence of the palm is covered with a sheath called an akmam.
Akmam was mentioned in the Holy Qur’an. Allah, the Most Merciful, the Most Compassionate, says: “To Him is referred the Knowledge of the Hour (of Judgment: He knows all): No date fruit comes out of its sheath, nor does a female conceive (within her womb) nor bring forth the Day that (Allah) will propound to them the (question), “where are the partners (ye attributed to Me)?” they will say, “we do assure thee not one of us can bear witness!” Surat Fussilat, Verse# 47
Malik said, "Someone who sells his crops when they are ripe and are ready in the husk has to pay zakat on them but the one who buys them does not. The sale of crops is not valid until they are ready in the husk and no longer need water." Muwatta Malik, book of Zakat