The works of Ādi Śaṅkarācārya

Chāndogyopaniṣadbhāṣyam

Verse 79

पशुषु पञ्चविधं सामोपासीताजा हिकारोऽवयः प्रस्तावो गाव उद्गीथोऽश्वाः प्र-तिहारः पुरुषो निधनम् ॥ १ ॥

In plain words

Meditate on the fivefold Sāma chant as manifested in animals: goats are the hiṅkāra, sheep the prastāva, cows the udgītha, horses the pratihāra, and man the nidhana.

Close to the Sanskrit

In animals one should meditate upon the five-fold Sāma: goats indeed are the hiṅkāra, sheep the prastāva, cows the udgītha, horses the pratihāra, and man the nidhana.