For the headword see LSJ s.v. ἄβαλε (web address 1). The entry = Photius, Lexicon alpha26 and, with the exception of the repetition of the headword within the entry (see note 2), also Synagoge alpha1 (Lexica Segueriana 3.10), Hesychius (s.v. ἄ βάλε , alpha60) and Apollonios Sophistes, Lexicon Homericum 2.15. The word does not occur in the extant text of Homer, but there are other literary attestations including Callimachus fr. 619 Pfeiffer, and Greek Anthology 7.583.1 (Agathias Scholasticus).
cf. generally alpha 14.
[1] For more on εἴθε see epsiloniota 55.
[2] Apparently the beginning of a quotation, perhaps from one of the works mentioned above. Otherwise the repetition of the headword is inexplicable. This repetition is already present in Photius, however.