Antimachus apud Pausanias 8.25.9. A psychoanalytic discussion of this yoking is given by George Devereux, Dreams in Greek Tragedy: An Ethno-Psycho-Analytical Study (University of California Press, 1976), p. 12 [1]
Isidore, Etymologies 18.26, as translated by Stephen A. Barney et al., The Etymologies of Isidore of Seville (Cambridge University Press, 2006), p. 368 online.
