Job 12:9 New English Translation

⁹Which of all these^[a] does not know
that the hand of the Lord^[b] has done^[c] this?

Job 12:9 tn This line could also be translated “by all these,” meaning “who is not instructed by nature?” (H. H. Rowley, Job [NCBC], 93). But D. J. A. Clines points out that the verses have presented the animals as having knowledge and communicating it, so the former reading would be best (Job [WBC], 279).
Job 12:9 tc Some commentators have trouble with the name “Yahweh” in this verse, which is not the pattern in the poetic section of Job. Three mss of Kennicott and two of de Rossi have “God.” If this is so the reminiscence of Isaiah 41:20 led the copyist to introduce the tetragrammaton. But one could argue equally that the few mss with “God” were the copyists’ attempt to correct the text in accord with usage elsewhere.
Job 12:9 sn The expression “has done this” probably refers to everything that has been discussed, namely, the way that God in his wisdom rules over the world, but specifically it refers to the infliction of suffering in the world.

New English Translation (NET)