Job 6:4

For the arrows of the Almighty are within me -That is, it is not a light affliction that I endure. I am wounded in a manner which could not be caused by man - called to endure a severity of suffering which shows that it proceeds from the Almighty. Thus called to suffer what man could not cause, he maintains that it is right for him to complain, and that the words which he employed were not an improper expression of the extent of the grief. The poison whereof drinketh up my spirit -Takes away my rigor, my comfort, my life. He here compares his afflictions with being wounded with poisoned arrows. Such arrows were not unfrequently used among the ancients.