| | Lexicon shalash: to do a third time, divide into three partsOriginal Word: שָׁלַשׁPart of Speech: VerbTransliteration: shalashPhonetic Spelling: (shaw-lash')Short Definition: old NAS Exhaustive ConcordanceWord Origin denominative verb from shaloshDefinition to do a third time, divide into three partsNASB Translation did it a third time (1), divide into three parts (1), do it a third time (1), stayed for three days (1), third time (2), three (2), three days (1), three parts (1), three year old (3). 
Brown-Driver-Briggs   I. [שִׁלֵּשׁ ]  Pi`el denominative do a third time, devide into three parts , etc.; — Perfect 2masculine singular וְשִׁלַּשְׁתָּ֫ Deuteronomy 19:3 divide  land into three parts  (so Imperfect וַיְשַׁלֵּשׁ אֶתהָֿעָם  [for ᵑ0 וַיְשַׁלַּח ] 2 Samuel 18:2 ᵐ5L  Bu); 1 Samuel 20:19 stay three days  (compare Dr); 1 Samuel 20:20  We Dr and others (compare ᵐ5 ) read ׳אֲשַׁלֵּשׁ בַּ  (for ׳שְׁלשֶׁת הַ ) = I will shoot on the third day with  the arrows (HPS question); Imperfect 3masculine plural וַיְשַׁלֵּ֑שׁוּ 1 Kings 18:34 , and Imperative  masculine plural שַׁלֵּ֑שׁוּ 1 Kings 18:34 do a third time. Pu`al Participle מְשֻׁלָּשׁ three years old Genesis 15:9 + 1 Samuel 1:24 (read with ᵐ5 Th We etc. בְּפַר מְשֻׁלָּשׁ for בְּפָרִם שְׁלשָׁה), feminine מְשֻׁלֶּשֶׁת Genesis 15:9 (twice in verse); הַחוּט הַמְשֻׁלָּשׁ Ecclesiastes 4:12 the threefold cord; female plural מְשֻׁלָּשׁוֺת Ezekiel 42:6 three-storied chambers. 
 
 
 
Strong's do the third time, divide into, stay three days,  A primitive root perhaps originally to intensify, i.e. Treble; but apparently used only as denominative from shalowsh, to be (causatively, make) triplicate (by restoration, in portions, strands, days or years) -- do the third time, (divide into, stay) three (days, - fold, parts, years old).  see HEBREW shalowsh  | 
 |