See that ye refuse not him that speaketh. For if they escaped not, refusing him that spake (rather, warned; the word here used is not λαλοῦντα, as before, but χρηματίζοντα, expressive of a Divine admonition or warning.
In the passive it is translated "warned of God," "admonished of God," Matthew 2:12, Matthew 2:22; Hebrews 8:5; Hebrews 11:7; of. Acts 10:22, ἐχρηματίσθη ὑπὸ ἀγγέλου ἁγίου) on earth, much more shall not we escape, if we turn away from him that speaketh (or, warneth) from heaven.
Here the warning begins. "Him that speaketh ( τὸν λαλοῦντα)," is suggested by λαλοῦντι in the preceding verse. But the subject is changed: it is God, not the "blood of sprinkling," that is now regarded as speaking to us from heaven.
It was God also that warned on earth; not, as some take it, Moses, whom the word χρηματίζοντα does not suit: of him it is said, κεκρημάτισται (Hebrews 8:5). The allusion is to the voice heard from the earthly Sinai, which the people entreated (supra, Hebrews 12:19, παρητήσαντο—the same word as is used here) should be heard no more.
But they escaped not the hearing of that voice, or the consequences of disregarding its warning (cf. Hebrews 2:2; Hebrews 3:10).