Bhagavatapurana 10.2.36

36. "Thy name and form cannot be comprehensively known or described by (enumerating) Thy attributes, deeds and births: for Thy course is only to be inferred, but not to be directly cognised and Thou art the witness of mind and speech: still, O brilliant Lord, those who are engaged in the performance of devout acts, i.e., in contemplation and worship realise Thee!

37. "He who, by listening to, or singing, or causing others to remember, or contemplating Thy auspicious names and forms and while performing his various duties, devotes his mind to Thy lotus-like feet, has not to sink in Samsara again.