וַיַּעַשׂ֩ ל֨וֹ אֵה֜וּד חֶ֗רֶב וְלָ֛הּ שְׁנֵ֥י פֵי֖וֹת גֹּ֣מֶד אָרְכָּ֑הּ וַיַּחְגֹּ֤ר אוֹתָהּ֙ מִתַּ֣חַת לְמַדָּ֔יו עַ֖ל יֶ֥רֶךְ יְמִינֽוֹ׃
And Ehud made him a sword which had two edges, of a cubit length; and he girded it under his raiment upon his right thigh.
Read halakhic rulings (Jewish law) on Judges 3:16: and classical halakhic sources.