PTBB 13.c:19[2] :לא ^תהל{ו}<י>ך^ ממדינחיה אלא ממערביה‏ : don't walk with him at his (i.e. the leper's) eastern side, but at his western side
See the entire entry for maḏnaḥ, maḏnḥā n.m./f. east