Bhagavatapurana 11.2.52.p1

11.2.52.p1

tri-bhuvana-vibhava-hetave 'py akuṇṭha- $ smṛtir ajitātma-surādibhir vimṛgyāt &

53. He is the foremost follower of Vishnu whose memory of the Lord is not interrupted even for the sake of the wealth of the three worlds and who does not get away from (forget), even for half a minute or half a second, the lotus-like feet of the Lord which are sought after by the gods and others that have not conquered their mind.