Shvetashvatara Upanishad 4.5 

There is One Unborn Being 

There is one unborn being (feminine), 

red, white and black,

but producing many creatures like herself,

There is one unborn being (masculine) 

who loves her and stays with her,

there is another unborn being (masculine) 

who leaves her after loving her.

~ Shvetashvatara Upanishad 4.5 Translated by Paul Deussen