Śrīmad-Bhāgavatam · Text 3.20.49
Who is speaking and story frame
स आत्मान् मन्यमान: कृतकृत्यमिवात्मभू: ।
तदा मनून् ससर्जान्ते मनसा लोकभावनान् ॥ ४९ ॥
sa ātmānaṁ manyamānaḥ
kṛta-kṛtyam ivātmabhūḥ
tadā manūn sasarjānte
manasā loka-bhāvanān
One day Brahmā, the self-born, the first living creature, felt as if the object of his life had been accomplished. At that time he evolved from his mind the Manus, who promote the welfare activities of the universe.
Read this verse on Vedabase.ioThis verse has no purport; its meaning is explained by the verses around it.