From John Gower, Confessio Amantis 3.767-816

(on the sin of “cheste,” or contention, strife; a subspecies of Wrath)

Bot after him was wo ynowh, woeful enough
And tok a full gret repentance, felt remorse
Wherof in tokne and remembrance
Of hem whiche usen wicke speche,
Upon this bridd he tok this wreche, vengeance
That ther he was snow whyt tofore,
Evere afterward colblak therfore where
He was transformed, as it scheweth,
And many a man yit him beschreweth curses
And clepen him into this day
A raven, be whom yit men mai
Take evidence, whan he crieth,
That som mishapp it signefieth.
Be war therfore and sei the beste, speak only the best
If thou wolt be thiself in reste,
Mi goode sone, as I thee rede. advise

Phebus, which makth the daies lihte,
A love he hadde, which tho hihte who was then called
Cornide, whom aboven alle
He pleseth. Bot what schal befalle
Of love ther is no man knoweth,
Bot as fortune hire happes throweth. Except
So it befell upon a chaunce,
A yong kniht tok hire aqueintance
And hadde of hire al that he wolde. desired
Bot a fals bridd, which sche hath holde
And kept in chambre of pure yowthe, from its earliest youth
Discoevereth all that evere he cowthe.
This briddes name was as tho
Corvus, the which was thanne also
Welmore whyt than eny swan,
And he (that schrewe) al that he can
Of his ladi to Phebus seide. told
And he for wraththe his swerd outbreide, unsheathed
With which Cornide anon he slowh. slew