at which the L–rd rendered them groups of mutes, deaf ones, and blind ones. They said to the mutes: Where is Moses? But they could not speak. To the deaf, but they could not hear. To the blind, but they could not see, as it is written (Ibid. 4:11) "Who made a mouth for man, or who makes one mute or deaf or seeing or blind?" Thus, "for the G–d of my father was my help."
At Which the Lord Rendered Them Groups of Mutes, Deaf Ones
Mekhilta Tractate Amalek 3:27