RASHI
1.
Their line is gone out through all the earth...
The line of the heavens, which are stretched out over the face of the entire earth, and because of which their words are at the end of the world, for all speak of the wonders they see.
בְּכׇל־הָאָ֨רֶץ ׀ יָ֘צָ֤א קַוָּ֗ם וּבִקְצֵ֣ה תֵ֭בֵל מִלֵּיהֶ֑ם לַ֝שֶּׁ֗מֶשׁ שָֽׂם־אֹ֥הֶל בָּהֶֽם
bechol–hoʾoretz yotzoʾ kauuom uviktzeyh seyveyl milleyhem lashemesh som–ʾohel bohem
Their line is gone out through all the earth, and their words to the end of the world; for the sun He has set a tabernacle in them.
1.
Their line is gone out through all the earth...
The line of the heavens, which are stretched out over the face of the entire earth, and because of which their words are at the end of the world, for all speak of the wonders they see.
1.
Their line is gone out through all the earth...
The line of their construction....because the structure is made by stretching out the line.
2.
...and their words to the end of the world...
Their works are their words.