δια 1223 PREP τι 5101 I-ASN οτι 3754 CONJ ουκ 3756 PRT-N εκ 1537 PREP πιστεως 4102 N-GSF αλλ 235 CONJ ως 5613 ADV εξ 1537 PREP εργων 2041 N-GPN νομου 3551 N-GSM προσεκοψαν 4350 5656 V-AAI-3P γαρ 1063 CONJ τω 3588 T-DSM λιθω 3037 N-DSM του 3588 T-GSN προσκομματος 4348 N-GSN
Vincent's NT Word Studies
32. Not by faith (ouk ek pistewv). A.V. and Rev. supply the ellipsis, they sought it not.They stumbled (prosekoyan). "In their foolish course Israel thought they were advancing on a clear path, and lo! all at once there was found in this way an obstacle upon which they were broken; and this obstacle was the very Messiah whom they had so long invoked in all their prayers" (Godet).
Robertson's NT Word Studies
9:32 We must supply the omitted verb edi"xa (pursued) from verse #31. That explains the rest. {They stumbled at the stone of stumbling} (prosekoyan twi liqwi tou proskommatos). The quotation is from #Isa 8:14. proskoptw means to cut (koptw) against (pros) as in #Mt 4:6; Joh 11:9f. The Jews found Christ a skandalon (#1Co 1:23).