The Upanishads, Part 1 (SBE01), by Max Müller, , at sacred-texts.com
1. Let a man meditate on the fivefold Sâman as the seasons. The hiṅkâra is spring, the prastâva summer (harvest of yava, &c.), the udgîtha the rainy season, the pratihâra autumn, the nidhana winter.
2. The seasons belong to him, nay, he is always in season (successful) who knowing this meditates on the fivefold Sâman as the seasons.