Srimad Bhagavatam — Navama Skandha, Shloka 18
Nimi’s Disembodied Liberation and the Rise of the Mithilā (Videha) Dynasty
तत: शीरध्वजो जज्ञे यज्ञार्थं कर्षतो महीम् । सीता शीराग्रतो जाता तस्मात् शीरध्वज: स्मृत: ॥ १८ ॥
tataḥ śīradhvajo jajñe yajñārthaṁ karṣato mahīm sītā śīrāgrato jātā tasmāt śīradhvajaḥ smṛtaḥ
From Hrasvaromā came a son named Śīradhvaja [also called Janaka]. When Śīradhvaja was plowing a field, from the front of his plow [śīra] appeared a daughter named Sītādevī, who later became the wife of Lord Rāmacandra. Thus he was known as Śīradhvaja.
FAQs
This verse states that Sītā manifested from the very tip of the plough while the king was ploughing the earth for the purpose of a yajña.
Because Sītā appeared from the plough (śīra), and due to that event he became known and remembered as Śīradhvaja.
It highlights sacred intention in work—when actions are done as an offering (yajña-bhāva), divine outcomes and blessings arise in unexpected ways.