מִקְצֵ֤ה הַשָּׁמַ֨יִם ׀ מֽוֹצָא֗וֹ וּתְקוּפָת֥וֹ עַל־קְצוֹתָ֑ם וְאֵ֥ין נִ֝סְתָּ֗ר מֵֽחַמָּתוֹ׃
פֿון עק פֿון די הימלען איז זײַן אױסגאַנג, און זײַן אַרומדרײ איז ביז זײערע עקן, און ניטאָ קײן פֿאַרבאָרגנס פֿון זײַן היץ.
Rashi
and its circuit is to their ends The circuit of its orbit is from one end to the other.
Radak
His going forth is from the end of the heaven – i.e. from the east:
Rashi
and none is hidden from its heat Had the sun been placed in the lowest sky, no man would be able to hide from its heat (Mid. Ps. 18:13) for the sun and the moon are in the second sky, as is stated (in Hagigah 12b): There are seven skies—Vilon, Rakia, Shehakim, Zevul, Machon, Ma’on, Aravothand he counts them in order: Vilon does not serve for anything; in Rakia are the sun, the moon, the stars, and the planets, etc.