Genèse 27:3

שא נא — The word שא means sharpen, similar to what שא read in the Mishna (Beitzah 28a) “One may not sharpen the knife in the usual manner but one may sharpen it by passing it (משיאין) over another”. Isaac said to Esau, “Sharpen your knife and slaughter an animal according to the regulations so that you may not give me to eat נבלה” (i.e. the flesh of animal that is not killed according to the ritual rules) (Genesis Rabbah 65:13). תליך means thy sword which is usually hung (at the side). צודה לי AND HUNT FOR ME [SOME VENISON] of animals that are ownerless, but not of such as are acquired by theft (literally, by robbery).

וְעַתָּה֙ שָׂא־נָ֣א כֵלֶ֔יךָ תֶּלְיְךָ֖ וְקַשְׁתֶּ֑ךָ וְצֵא֙ הַשָּׂדֶ֔ה וְצ֥וּדָה לִּ֖י (צידה) [צָֽיִד]׃

now therefore take, I pray thee, thy weapons, thy quiver and thy bow, and go out to the field, and catch me some venison;