The works of Ādi Śaṅkarācārya

Bṛhadāraṇyakopaniṣadbhāṣyam

Verse 4

सोऽकामयत भूयसा यज्ञेन भूयोयजेयेति ।सोऽश्राम्यत्तस्. तपोऽतप्यत

In plain words

He desired, 'May I perform a greater sacrifice once again.' He exerted himself and practiced intense austerity.

Close to the Sanskrit

He desired, 'May I sacrifice with a greater sacrifice, may I sacrifice again.' He labored; he practiced austerity.