Job 15:14

15:14 What is man that he should be pure,

or one born of woman, that he should be righteous?

Job 25:4

25:4 How then can a human being be righteous before God?

How can one born of a woman be pure? ¹ 

[25:4]  ¹ sn Bildad here does not come up with new expressions; rather, he simply uses what Eliphaz had said (see Job 4:17-19 and 15:14-16).