Bhagavatapurana 6.6.10

6.6.10

saṅkalpāyāstu saṅkalpaḥ kāmaḥ saṅkalpajaḥ smṛtaḥ /
vasavo 'ṣṭau vasoḥ putrāsteṣāṃ nāmāni me śṛṇu //

10. Of Muhurta was born Sankalpa whose son is known to be Kama, the thought-born (or Manmatha); the eight Vasus are the sons of Vasu and bear their names.