וְה֣וּא ׀ מְדַבֵּ֣ר עִמָּ֗ם וְהִנֵּ֣ה אִ֣ישׁ הַבֵּנַ֡יִם עוֹלֶ֞ה גָּלְיָת֩ הַפְּלִשְׁתִּ֨י שְׁמ֤וֹ מִגַּת֙ ממערות [מִמַּעַרְכ֣וֹת] פְּלִשְׁתִּ֔ים וַיְדַבֵּ֖ר כַּדְּבָרִ֣ים הָאֵ֑לֶּה וַיִּשְׁמַ֖ע דָּוִֽד׃
大衛正與他們說話的時候，看哪，那個在兩軍之間叫戰的勇士，就是迦特的非利士人，名叫歌利亞，從非利士人的陣中上來，說了先前那些話；大衛都聽見了。
Rashi
Lahmi, the brother of Goliath the Gittite, and the staff of his spear was as [thick as] a weavers’ beam like the round stick about which they wrap the cloth while weaving. Jonathan translated that verse in Samuel: And David the son of Jesse, the weaver of the dividing curtain of the Temple, slew. He interprets Jair (יָעִיר) as being similar to the Lebanon forest (יַעַר). He was paid in kind: Let David, whose mother wove the dividing curtain for the Temple with a weavers’ beam, slay Goliath, whose spear staff was as thick as a weavers’ beam. Now why does Scripture call him Elhanan? Because God favored him (ה' חֲנָנוֹ). I believe that Goliath the Gittite is not identical with Goliath the Philistine. One reason is that there [I Sam. 17:23] he called him Goliath the Philistine. Another reason is that above it is written: “... then Sibbecai the Hushathite smote Sippai of the sons of Rapha,” and also below it is written: “and he too was born to Raphah.” Since he does not mention that Goliath the Gittite was a son of Rapha, it proves that he [Goliath the Gittite] was not her son