Kuntidevi never forgot her first child, Karna, and after Karna's death in the Battle of Kuruksetra she lamented and admitted before her other sons that Karna was her eldest son prior to her marriage with Maharaja Pandu

Expressions researched:
"Kuntidevi never forgot her first child, Karna, and after Karna's death in the Battle of Kuruksetra she lamented and admitted before her other sons that Karna was her eldest son prior to her marriage with Maharaja Pandu"

SB Canto 1

Kuntīdevī never forgot her first child, Karṇa, and after Karṇa's death in the Battle of Kurukṣetra she lamented and admitted before her other sons that Karṇa was her eldest son prior to her marriage with Mahārāja Pāṇḍu.

SB 1.13.3-4, Purport:

Later on, when the Pāṇḍavas were banished from the kingdom by the intrigues of Duryodhana, Kuntī followed her sons, and she equally faced all sorts of difficulties during those days. During the forest life one demon girl, Hiḍimbā, wanted Bhīma as her husband. Bhīma refused, but when the girl approached Kuntī and Yudhiṣṭhira, they ordered Bhīma to accept her proposal and give her a son. As a result of this combination, Ghaṭotkaca was born, and he fought very valiantly with his father against the Kauravas. In their forest life they lived with a brāhmaṇa family that was in trouble because of one Bakāsura demon, and Kuntī ordered Bhīma to kill the Bakāsura to protect the brāhmaṇa family against troubles created by the demon. She advised Yudhiṣṭhira to start for the Pāñcāladeśa. Draupadī was gained in this Pāñcāladeśa by Arjuna, but by order of Kuntī all five of the Pāṇḍava brothers became equally the husbands of Pāñcālī, or Draupadī. She was married with five Pāṇḍavas in the presence of Vyāsadeva. Kuntīdevī never forgot her first child, Karṇa, and after Karṇa's death in the Battle of Kurukṣetra she lamented and admitted before her other sons that Karṇa was her eldest son prior to her marriage with Mahārāja Pāṇḍu. Her prayers for the Lord after the Battle of Kurukṣetra, when Lord Kṛṣṇa was going back home, are excellently explained. Later she went to the forest with Gāndhārī for severe penance. She used to take meals after each thirty days. She finally sat down in profound meditation and later burned to ashes in a forest fire.