स नैव व्यभवत् ।स विशमसृजत ।यान्येतानि देवजातानि गणश आख्यायन्ते वसवो रुद्रा आदित्या विश्वे देवा मरुत इति ॥बृह. १,४.१२ ॥
In plain words
It still did not flourish. It brought forth the people — those classes of gods that are named in groups: the Vasus, the Rudras, the Ādityas, the All-gods and the Maruts.
The commentators
Bṛhadāraṇyakopaniṣadbhāṣyam· bhāṣya
क्षत्रे सृष्टेऽपि, स नैव व्यभवत्, कर्मणे ब्रह्म तथा न व्यभवत्, वित्तोपार्जयितुरभावात्; स विशमसृजत कर्म- साधनवित्तोपार्जनाय; कः पुनरसौ विट्? यान्येतानि देव- जातानि— स्वार्थे निष्ठा, य एते देवजातिभेदा इत्यर्थः— गणशः गणं गणम्, आख्यायन्ते कथ्यन्ते— गणप्राया हि विशः; प्रायेण संहता हि वित्तोपार्जने समर्थाः, न एकै- कशः— वसवः अष्टसंख्यो गणः, तथैकादश रुद्राः, द्वा- दश आदित्याः, विश्वे देवाः त्रयोदश विश्वाया अपत्यानि— सर्वे वा देवाः, मरुतः सप्त सप्त गणाः ॥
In plain words
Even after the warrior class was created, Brahman still did not fully prosper for lack of someone to acquire wealth. Therefore, to secure the resources needed for action, it created the merchant class.
Close to the Sanskrit
Even when the warrior class was created, Brahman did not thus prosper, due to the absence of an earner of wealth; he created the merchant class for earning wealth as the means for action...