Matthew 5:37

37Let it beἔστωhoweverδὲtheὁstatementλόγοςof youὑμῶνYesναὶ‘Yesναί,[and] ‘NoοὒNoοὔ·Theτὸhoweverδὲmore thanπερισσὸνtheseτούτωνfromἐκτοῦevilπονηροῦcomesἐστιν.

But let your⁺ word ‘Yes’ be ‘Yes,’ [and] ‘No,’ ‘No.’ And that which [is] more than these comes from the evil one.