Bhagavatapurana 4.4.33

4.4.33

adhvaryuṇā hūyamāne devā utpetur ojasā /
ṛbhavo nāma tapasā somaṃ prāptāḥ sahasraśaḥ //

33. When the priest Adhvaryu *viz.* Bhrigu poured the offering on it, certain gods called the Ribhus who had secured a

share in the Soma juice by dint of their *Tapas*, came forth in thousands and with great force.