και 2532 CONJ αναστεναξας 389 5660 V-AAP-NSM τω 3588 T-DSN πνευματι 4151 N-DSN αυτου 846 P-GSM λεγει 3004 5719 V-PAI-3S τι 5101 I-NSN η 3588 T-NSF γενεα 1074 N-NSF αυτη 3778 D-NSF σημειον 4592 N-ASN επιζητει 1934 5719 V-PAI-3S αμην 281 HEB λεγω 3004 5719 V-PAI-1S υμιν 5213 P-2DP ει 1487 COND δοθησεται 1325 5701 V-FPI-3S τη 3588 T-DSF γενεα 1074 N-DSF ταυτη 3778 D-DSF σημειον 4592 N-ASN
Vincent's NT Word Studies
12. Sighed deeply in his spirit. Peculiar to Mark.There shall no sign be given (ei doqhsetai shmeion). Lit., if a sign shall be given. The expression, is elliptical. It is a Hebrew idiom, and is really, at bottom, a form of imprecation. If I do not thus or so, may some judgment overtake me. Compare Heb. iii. 11.
Robertson's NT Word Studies
8:12 {He sighed deeply in his spirit} (anastenaxas twi pneumati). The only instance of this compound in the N.T. though in the LXX. The uncompounded form occurs in #Mr 7:34 and it is common enough. The preposition ana- intensifies the meaning of the verb (perfective use). "The sigh seemed to come, as we say, from the bottom of his heart, the Lord's human spirit was stirred to its depths" (Swete). Jesus resented the settled prejudice of the Pharisees (and now Sadducees also) against him and his work. {There shall no sign be given unto this generation} (ei doqesetai tei geneai tautei semeion). #Mt 16:4 has simply ou doqesetai, plain negative with the future passive indicative. Mark has ei instead of ou, which is technically a conditional clause with the conclusion unexpressed (Robertson, _Grammar_, p. 1024), really aposiopesis in imitation of the Hebrew use of im. this is the only instance in the N.T. except in quotations from the LXX (#Heb 3:11; 4:3,5). It is very common in the LXX. The rabbis were splitting hairs over the miracles of Jesus as having a possible natural explanation (as some critics do today) even if by the power of Beelzebub, and those not of the sky (from heaven) which would be manifested from God. So they put up this fantastic test to Jesus which he deeply resents. #Mt 16:4 adds "but the sign of Jonah" mentioned already by Jesus on a previous occasion (#Mt 12:39-41) at more length and to be mentioned again (#Lu 11:32). But the mention of the sign of Jonah was "an absolute refusal of signs in their sense" (Bruce). And when he did rise from the dead on the third day, the Sanhedrin refused to be convinced (see Acts 3 to 5).