Garudapurana 3.29.67

3.29.67

praṇamakāle devadevasya viṣṇoḥ śeṣāntasthaṃ saṃsmareccaiva viṣṇum /
sunītikāle saṃsmarennārasiṃhaṃ nārāyaṇaṃ saṃsaṃmaretsarvadāpi //

At the time of bowing to Viṣṇu, the God of gods, one should remember Viṣṇu seated upon Śeṣa; / at the time of proper conduct, one should always remember Nārasiṃha and Nārāyaṇa.