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John 13:14
Robinson-Pierpont Byzantine Textform · Berean Standard Bible
Εἰ οὖν ἐγὼ ἔνιψα ὑμῶν τοὺς πόδας, ὁ κύριος καὶ ὁ διδάσκαλος, καὶ ὑμεῖς ὀφείλετε ἀλλήλων νίπτειν τοὺς πόδας.
So if I, your Lord and Teacher, have washed your feet, you also should wash one another’s feet.