"That no poor person shall enter upon you today," meaning: that you shall not feed any poor person today.
﴿أَلا يدخلنها الْيَوْم عَلَيْكُم مِسْكين﴾ أَيْ: أَلَّا تُطْعِمُوا الْيَوْمَ مِسْكِينًا
