Garudapurana 1.202.1

1.202.1

śrīgaruḍamahāpurāṇam- 202
hariruvāca /
ekaṃ punarnavāmūlamapāmārgasya vā śiva /
sarasaṃ yoniniḥ kṣiptaṃ varāṅgasya vyathāṃ haret /
prasūtivedanāñcaiva taruṇīnāṃ vyathāṃ haret //

The glorious Garuḍa Mahāpurāṇa — 202 / Hari said: / A single root of punarnavā or of apāmārga, O Śiva, / placed juicy into the vagina, removes pain of the vulva, / and it relieves the pain of labour in young women.