Creation of various humans and division of The Creator.

For the expansion of the humans, The Creator Brahma created The Brahmins from His mouth, Kshatriyas from His arms, Vaishyas from His stomach and The Shudras from His feet. Manu Smiriti.
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To equalise the creation, The Creator Brahma divided himself into two parts. On division, His half portion retained himself and became Man (Manu) and the other divided half became a woman (Shatrupa). Then they had Intercourse with each other and thus they created this great universe. Manu Smiriti. 1/34

Manu said, O Saints! I am the same and the one, whom The Virat Purush (The Biggest Man) have created after performance of severe Austerity. Hence you may know me as the Creator of the whole Universe. Manu Smiriti. 1/35

I myself have performed severe Austerity to create the creatures and after succeeding in that, first of all I produced the Ten Great Saints. Manu Smiriti. 1/36

The Ten Great Sages that were produced by The Manu are, Marichi, Atri, Angira, Pulastya, Pulah, Kritu, Pracheta, Vasistha, Bhrigu and Narad. Manu Smiriti. 1/37