Meaning of the Sanskrit Word: rsabhasya

  ṛṣabhasya—of the best    SB 3.16.23
  ṛṣabhasya—of the Supreme Personality of Godhead    SB 3.28.26
  ṛṣabhasya—of Lord Ṛṣabhadeva    SB 5.6.7

Can't find any compound Sanskrit words containing rsabhasya.