SamTgJ Ex23:5 :אטענו תטין עמה‏ : you must help him load it
See the entire entry for ṭˁn vb. to carry

SamTgJ Ex23:5 :חמור סנך רבע תחת מסבלה‏ : your enemy's ass crouching under its burden
See the entire entry for msbl n.m. burden