Skanda Purana 4.101.56

4.101.56

52 divodāsanṛpatiniṣkāsanāya śivapreṣitasya caturānanasya dvijaveṣeṇa kāśyāṃ daśasaṃkhyākāśvamedhakaraṇāttīrthasyadaśāśvamedhanāmakaraṇakathanam, tattīrthamāhātmyavarṇanaṃ ca 229 1

52. Account of the Four-faced One [Brahmā], sent by Śiva to expel King Divodāsa, performing ten horse sacrifices in Kāśī in the guise of a twice-born, from which the sacred ford received the name Daśāśvamedha; and description of the māhātmya of that sacred ford. 229 1