The works of Ādi Śaṅkarācārya

Viṣṇusahasranāmastotram

Verse 81

हरिरेकः सदा ध्येयो भवद्भिः सत्त्वसंस्थितैः ।ओमित्येवं सदा विप्राः पठध्वं ध्यात केशवम् ॥

In plain words

Hari alone, always: he is the one to hold in meditation, by you who stand settled in sattva. Begin with Om — like that, always, brahmins, recite aloud; meditate on Keśava.

Close to the Sanskrit

Hari alone is always to be meditated upon by you who are firmly established in sattva. 'Om' — thus, always, O brāhmaṇas, recite; meditate upon Keśava.