seven days ... nights - They did not remain in the same posture and without food, etc., all this time, but for most of this period daily and nightly. Sitting on the earth marked mourning (Lam 2:10). Seven days was the usual length of it (Gen 50:10; 1Sa 31:13). This silence may have been due to a rising suspicion of evil in Job; but chiefly because it is only ordinary griefs that find vent in language; extraordinary griefs are too great for utterance.