מִכֹּ֣ל ׀ הָעָ֣ם הַזֶּ֗ה שְׁבַ֤ע מֵאוֹת֙ אִ֣ישׁ בָּח֔וּר אִטֵּ֖ר יַד־יְמִינ֑וֹ כָּל־זֶ֗ה קֹלֵ֧עַ בָּאֶ֛בֶן אֶל־הַֽשַּׂעֲרָ֖ה וְלֹ֥א יַחֲטִֽא׃ (פ)
All this people, even seven hundred chosen men, were left-handed; every one could sling stones at a hair-breadth, and not miss.
Rashi on Judges
With shriveled right arms. Their right arms were shrunken. They could not utilize them, as if they were closed, as in "Let not the well close its mouth over me."3Tehilim, 69:16.