Srimad Bhagavatam Canto 08, Chapter 05, Text 39

SB 8.5.39

balan mahendras tri-dasah prasadan
 manyor giriso dhisanad viriñcah
khebhyas tu chandamsy rsayo medhratah kah
 prasidatam nah sa maha-vibhutih
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Mahendra, the King of Heaven, was generated from the prowess of the Lord, the demigods were generated from the mercy of the Lord, Lord Siva was generated from the anger of the Lord, and Lord Brahma from His sober intelligence. The Vedic mantras were generated from the bodily holes of the Lord, and the great saints and prajapatis were generated from His genitals. May that supremely powerful Lord be pleased with us.
 
Srimad Bhagavatam Canto 08, Chapter 05, Text 40
Srimad Bhagavatam Canto 08, Chapter 05, Text 41