A staff in the hand
For the one who spares his staff hates his own son, but the one who loves disciplines carefully — we have read in Proverbs.
Greek
ὁ φειδόμενος γὰρ τῆς βακτηρίας αὐτοῦ μισ[εῖ τ]ὸν ἑαυτοῦ υἱὸν, ὁ δὲ ἀγαπ[ῶ]ν ἐπιμελῶς παιδεύει, ἐν τοῖς Παρ[οιμ]ίαις ἀνέγνωμεν.