1 The interrogative clause is used here as an exclamation, and sarcastic at that. Job is saying “you have in no way helped the powerless.” The verb uses the singular form, for Job is replying to Bildad.
2 The “powerless” is expressed here by the negative before the word for “strength; power”—“him who has no power” (see §152.u, v).
3 Heb “the arm [with] no strength.” Here too the negative expression is serving as a relative clause to modify “arm,” the symbol of strength and power, which by metonymy stands for the whole person. “Man of arm” denoted the strong in 22:8.
4 The phrase לָרֹב (larov) means “to abundance” or “in a large quantity.” It is also used ironically like all these expressions. This makes very good sense, but some wish to see a closer parallel and so offer emendations. Reiske and Kissane thought “to the tender” for the word. But the timid are not the same as the ignorant and unwise. So Graetz supplied “to the boorish” by reading לְבָעַר (léba’ar). G. R. Driver did the same with less of a change: לַבּוֹר (labbor; 29 [1936]: 172).
5 The verse begins with the preposition and the interrogative: אֶת־מִי (’et-mi, “with who[se help]?”). Others take it as the accusative particle introducing the indirect object: “for whom did you utter …” (see §117.gg). Both are possible.
6 Heb “has gone out from you.”

In other versions

“How you have helped him who has no power!

How you have saved the arm that has no strength!

How you have counseled him who has no wisdom,

and plentifully declared sound knowledge!

With whose help have you uttered words,

and whose breath has come out from you?

“How you have helped the powerless!

How you have saved the arm that is feeble!

What advice you have offered to one without wisdom!

And what great insight you have displayed!

Who has helped you utter these words?

And whose spirit spoke from your mouth?

How you have helped the powerless

and delivered the arm that is weak!

How you have counseled the unwise

and abundantly provided insight!

With whom did you speak these words?

Whose breath came out of your mouth?

“How you have helped the powerless!

How you have saved the weak!

How you have enlightened my stupidity!

What wise advice you have offered!

Where have you gotten all these wise sayings?

Whose spirit speaks through you?

“How you have helped one who has no power!

How you have assisted the arm that has no strength!

How you have advised one who has no wisdom!

And what sound wisdom you have made known in abundance!

With whose help have you uttered words,

and whose breath has come forth from you?

How hast thou helped him that is without power?

How savest thou the arm that hath no strength?

How hast thou counselled him that hath no wisdom?

And how hast thou plentifully declared the thing as it is?

To whom hast thou uttered words?

And whose spirit came from thee?

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