In Clement of Alexandria, Stromateis 1.20.100.5, the line that corresponds directly to the Didache is:
«φησὶ γοῦν· υἱέ, μὴ γίνου ψεύστης· ὁδηγεῖ γὰρ τὸ ψεῦσμα πρὸς τὴν κλοπήν.»
In the Didache (Teaching of the Twelve Apostles) 3.5 the line is:
«τέκνον μου, μὴ γίνου ψεύστης, ἐπειδὴ ὁδηγεῖ τὸ ψεῦσμα εἰς τὴν κλοπήν...»
In English: “My child, do not be a liar, because lying leads to theft.”
