Ahaḥ or Ahan is a sacred place mentioned in Mahābhārta (Mahabharata). One may attain Sūryaloka (Suryaloka; the divine abode of the Sun-god), by having a bath in the water of this place.

Mahābhārata (Kinjawadekar)(3.83.100)
Mahābhārata Vols. 1-43 (Siddhāntabāgīśa)(3.68.100)