See Vasari, vol. xii. p. 333, and Gotti's Vita di Michelangelo Buonarroti, vol. i. p. 4, for a discussion of this claim, and for a letter written by Alessandro Count of Canossa, in 1520, to the artist.
That Michael Angelo was contemptuous to brother artists, is proved by what Torrigiani said to Cellini: "Aveva per usanza di uccellare tutti quelli che dissegnavano." He called Perugino goffo, told Francia's son that his father made handsomer men by night than by day, and cast in Lionardo's teeth that he could not finish the equestrian statue of the Duke of Milan. It is therefore not improbable that when, according to the legend, he corrected a drawing of Ghirlandajo's, he may have said things unendurable to the elder painter.
Engraved in outline in Harford's Illustrations of the Genius of Michael Angelo Buonarroti, Colnaghi, 1857.