ونهى صلى الله عليه وآله عن الجداد بالليل يعني جداد النخل، والجداد الصرم وإنما نهى عنه بالليل لان المساكين لا يحضرونه.
He, Allah’s blessings be upon him and his Family, also forbade jidad during nights, meaning performing jidad to palm trees. Jidad is to crack down. He only forbade it at night because the needy will not attend it (when it is cracked down).