John Gill

And at the evening sacrifice I rose up from my heaviness,.... The signs and tokens of it, particularly sitting on the ground; or "from my fasting" (n), having eaten nothing that day, it being early in the morning when he was told the above case: and having rent my garment and my mantle; which he had done before, and still kept them on him in the same case: fell upon my knees, and spread out my hands unto the Lord my God; in the posture and with the gesture of an humble supplicant. (n) "jejunio meo", Michaelis; so Jarchi.