Ramayana
जानामि चेमौ पुत्रौ मे यमजातौ कुशीलवौ । शुद्धायां जगतो मध्ये मैथिल्यां प्रीतिरस्तु मे ॥ 7-97-5 ॥
"And I know that these two twin-born boys, Kusha and Lava, are my sons; let my affection be set upon Maithili, who is pure, here in the midst of the world."
english translation