Three vaguely related proverbs
Suda, s.v. Eris; Mantissa Proverbium 1.60
“Strife that gives birth to strife fosters reason.”
῎Ερις ἔριν τίκτουσα προσμνᾶται λόγον.
The paroemiographer Arsenius adds: “this is applied to those striving over philosophy” (ἤτοι ἐπὶ φιλοσοφίᾳ ἐριζόντων).
Michael Apostolius, 17.73
“A boar once pursued an Athenian conflict”: Theocritus. [A proverb] applied to this who love to strive with those who are stronger”
῟Υς πότ’ ᾿Αθηναίαν ἔριν ἤρισεν: Θεόκριτος. ἐπὶ τῶν τοῖς κρείττοσι φιλονεικούντων.
Michael Apostolius, 17.74
“The boar surges up”: A proverb applied to violent [people] and competitive [people or circumstances]”
῟Υς ὀρίνει: ἐπὶ τῶν βιαίων λέγεται καὶ ἐριστικῶν.

This is the most boaring piece you have ever posted.
I don’t want to be piggish about this and give you all the gory details–they would definitely boar you nearly to death and leave you marked like Ouly-sses.