Charles H. Spurgeon on Psalms 35:13

"My prayer returned into, or was directed to, my bosom." Of the many interpretations that are given of this passage, that appears to me the most probable which derives it from the posture of the worshipper; who standing with his head inclined downward toward his bosom, turned away his attention from all external objects, and uttered his mournful and earnest requests, as if they were directed to his own bosom. Such a posture of devotion is in use both among Jews and Mohammedans. —Koehler in Reporter. Lit. Orient.; and Reland de Relig. Mohammedica, quoted by Walford in loc.