Bhashya
एतद्वैराजमृतुषु प्रोत वेद, विराजति ऋतुवत्— यथाऋतव आर्तवैर्धर्मैर्विराजन्ते, एव प्रजादिभिर्विद्वानिति ।उक्त-मन्यत् ।ऋतून्न निन्देत्, तद्व्रतम् ॥
In plain words
Whoever knows this resplendent truth woven into the seasons shines forth like them. Just as the seasons shine through their characteristic features, the wise person shines through offspring and prosperity. The rest is already stated. Let no one disparage the seasons—that is the sacred vow.
Close to the Sanskrit
This resplendent truth woven in the seasons, he who knows shines like the seasons; just as seasons shine by seasonal traits, so the wise one shines by progeny and others, thus. The rest has been spoken. One should not disparage the seasons; that is the observance.