Ramayana
कामं श्वश्रूर्ममैव त्वं त्वत्सकाशाद्धि मैथिली । कर्षता हलहस्तेन जनकेनोद्धृता पुरा ॥ 7-98-7 ॥
You are indeed my very own mother-in-law, for it was from you that Maithili came forth, when Janaka, plough in hand, drew her up from you long ago as he furrowed the field.
english translation