Komentaryong Sumisipi para sa Mga Awit 72:5

A thirty-first meaning of the words in our verse is related to Psalms 72,5: "Let them fear you as long as the sun shines, etc." our sages in Berachot 29 comment on this verse that the time for all creatures to perform their service for the Lord is in the morning, the time allocated for our morning prayers. The next time for the creatures to perform their service for G'd is when the sun sets. We may understand the meaning of אם בחקתי תלכו as reflecting Psalms 55,15: "let us walk together in G'd's house when there is turmoil (outside)." The words ואת מצותי תשמרו refer to the practice of the early חסידים who used to assemble an hour before prayer in order to prepare themselves emotionally (Berachot 29). The words ועשיתם אתם are to be understood as a medicine against natural disasters involving the sun and the moon (eclipses and the like which are interpreted as harbingers of catastrophes) The premise underlying this concept is that misconduct by the inhabitants of the "lower" part of the universe will have an impact on the conduct of the planets, especially those influencing our daily lives such as the sun and moon (compare Sukkah 29).

עד דלא תנץ החמה – Since the ultra-pious ones are exacting upon themselves to complete (the Amidah) with sunrise, as it states (Psalms 72:5), “Let them fear You as long as the sun shines [while the moon lasts, generations on end].”