The Upanishads, Part 1 (SBE01), by Max Müller, , at sacred-texts.com
1. Rising, the sun is the hiṅkâra, risen, he is the prastâva, at noon he is the udgîtha, in the afternoon he is the pratihâra, setting, he is the nidhana. That is the Brihat Sâman as interwoven in the sun 1.
2. He who thus knows the Brihat as interwoven in the sun, becomes refulgent 2 and strong, he reaches the full life, he lives long, becomes great with children and cattle, great by fame. His rule is, 'Never complain of the heat of the sun.'
30:1 The sun is brihat. The Brihat Sâman is to be looked upon as the sun, or the Brihat has Âditya for its deity.
30:2 The same as brahmavarkasin.