all that therein is - Hebrew, “whatever fills it.” Micaiah, son of Imlah, our prophet’s namesake, begins his prophecy similarly, “Hearken, O people, every one of you.” Micah designedly uses the same preface, implying that his ministrations are a continuation of his predecessor’s of the same name. Both probably had before their mind Moses’ similar attestation of heaven and earth in a like case (Deu 31:28; Deu 32:1; compare Isa 1:2).
God be witness against you - namely, that none of you can say, when the time of your punishment shall come, that you were not forewarned. The punishment denounced is stated in Mic 1:3, etc.
from his holy temple - that is, heaven (1Ki 8:30; Psa 11:4; Jon 2:7; compare Rom 1:18).