en_tn/mrk/07/37.md

were extremely astonished

"were utterly amazed" or "were exceedingly astonished" or "were astonished beyond all measure"

the deaf hear and the mute speak

These refer to people. Alternate translation: "the deaf people hear and the mute people speak" or "people who cannot hear, hear, and people who cannot speak, speak" (See: rc://en/ta/man/translate/figs-metonymy)