Πρὸ πάντων δέ, ἀδελφοί μου, μὴ ὀμνύετε, μήτε τὸν οὐρανόν, μήτε τὴν γῆν, μήτε ἄλλον τινὰ ὅρκον· ἤτω δὲ ὑμῶν τὸ ναί, ναί, καὶ τὸ οὔ, οὔ· ἵνα μὴ εἰς ὑπόκρισιν πέσητε.
KJVBut above all things, my brethren, swear not, neither by heaven, neither by the earth, neither by any other oath: but let your yea be yea; and your nay, nay; lest ye fall into condemnation.
Above all, my brothers and sisters, do not swear — not by heaven or by earth or by anything else. All you need to say is a simple Yes or No. Otherwise you will be condemned.