from whence it riseth - Hebrew, “the dawn thereof,” that is, its first rising. Evil shall come on thee without the least previous intimation [Rosenmuller]. But dawn is not applied to “evil,” but to prosperity shining out after misery (Isa 21:12). Translate, “Thou shall not see any dawn” (of alleviation) [Maurer].
put ... off - rather, as Margin, “remove by expiation”; it shall be never ending.
not know - unawares: which thou dost not apprehend. Proving the fallacy of thy divinations and astrology (Job 9:5; Psa 35:8).