{Even the dust} (kai ton koniorton). Old word from
konis, dust, and ornumi, to stir up. We have seen it already
in  Mt 10:14  Lu 9:5 . Dust is a plague in the east. Shake off
even that. {Cleaveth} (koll(8874)henta). First aorist passive
participle of kolla(935c), to cling as dust and mud do to shoes.
Hence the orientals took off the sandals on entering a house. {We
wipe off} (apomassometha). Middle voice of an old verb
apomass(935c), to rub off with the hands. Nowhere else in the N.T.
But ekmass(935c), occurs in  Lu 7:38,44 . {Against you} (Humin).
Fine example of the dative of disadvantage (the case of personal
interest, the dative).