TgJ Is38:21 :יִסְבוּן דִבלַת תֵינִין וְיִסרְטוּן עַל שִחנָא‏ : one should take fig paste and scratch it into the lesion
See the entire entry for srṭ vb. to scratch, draw

TgJ Is38:21 :יִסְבֻון דִבלַת תֵינִין וְיִסרְטֻון"וְיִשטְרֻון" עַל שִחנָא‏ : they should take a fig-cake and scratch (var. smear) it on the skin eruption
See the entire entry for šṭr#2 vb. to spread