SB 3.20.22

devatāḥ prabhayā yā yā
 dīvyan pramukhato ’sṛjat
te ahārṣur devayanto
 visṛṣṭāṁ tāṁ prabhām ahaḥ
Synonyms: 
devatāḥ — the demigods; prabhayā — with the glory of light; yāḥ yāḥ — those who; dīvyan — shining; pramukhataḥ — chiefly; asṛjat — created; te — they; ahārṣuḥ — took possession of; devayantaḥ — being active; visṛṣṭām — separated; tām — that; prabhām — effulgent form; ahaḥ — daytime.
Translation: 
He then created the chief demigods, who were shining with the glory of goodness. He dropped before them the effulgent form of daytime, and the demigods sportingly took possession of it.
Purport: 

Demons were born from the creation of night, and the demigods were born from the creation of day. In other words, demons like the Yakṣas and Rākṣasas are born of the quality of ignorance, and demigods are born of the quality of goodness.