Albert Barnes Commentary Job 10:9

"Remember, I beseech thee, that thou hast fashioned me as clay; And wilt thou bring me into dust again?" — Job 10:9 (ASV)

Remember, I beseech thee, that thou hast made me as the clay - There is evident allusion here to the creation of man, and to the fact that he was moulded from the dust of the earth—a fact which would be preserved by tradition; see (Genesis 2:7). The fact that God had moulded the human form as the potter moulds the clay, is one that is often referred to in the Scriptures; compare (Romans 9:20–21).

The object of Job in this is, probably, to recall the fact that God, out of clay, had formed the noble structure, man, and to ask whether it was his intention to reduce that structure again to its former worthless condition—to destroy its beauty, and to erase the remembrance of his workmanship? Was it fitting for God so to blot out every memorial of his own power and skill in moulding the human frame?