Matthew 17:1

Irenaeus Against Heresies Book II

were called wise by the Lord; and, in like manner, five were styled foolish. Again, five men are said to have been with the Lord when He obtained testimony[189]

Tertullian The Prescription Against Heretics

Of what could He have meant those to be ignorant, to whom He even exhibited His own glory with Moses and Elias, and the Father's voice moreover, from heaven?[231]

Tertullian On Monogamy

while, in the revelation of His own glory, He prefers, from among so many saints and prophets, to have with him Moses and Elias[72]

Tertullian On Fasting

Deservedly, therefore, even while in the flesh, did the Lord show Himself to him, the colleague of His own fasts, no less than to Elijah.[42]

Hippolytus Refutation of All Heresies Book VI

that in the similitude of an image He appeared who after the six days Himself ascended the mountain a fourth person, and became the sixth.[136]

Origen Commentary on Matthew Book XII " according to Matthew and Mark,[227]