Tertullian, Adversus Judaeos 10, 6 (Corpus Christianorum, Series Latina (CCSL) 2.2, 1376). See also Adversus Judaeos 13.20–22 (CCSL 2.2, 1388–1389) in which Tertullian also refers to the bramble in which the ram was caught by the horns as a sign of the crown of thorns. See Irenaeus, Adversus Haereses 4.10.1.