BT Pes 113a(21) :כל אשראיי ספק אתי ספק לא אתי‏ : it is doubtful whether all outstanding credit will be repaid [lit. come] or not
See the entire entry for ˀšrˀy n.m.pl. sale on trust, credit

BT Pes 113a(21) :כל אשראיי ספק אתי ספק לא אתי‏ : whether or not every credit sale succeeds is doubtful
See the entire entry for ˀty vb. to come, arrive

BT Pes 113a(21) :כל אגב גביי בייא, כל אשראיי ספק אתי ספק לא אתי‏ : every (transaction wherein is stated) "by means of" requires it to be something collected; every credit transaction is uncertain if it will come to fruition
See the entire entry for gḇē, gaḇyā adj. selected, collected