With grief; with continual weeping. See Poole "Psa_6:7".
My soul; my sorrows are not counterfeit or slight, but inward and hearty; my mind is oppressed, my heart is ready to sink under my burden.
My belly, i.e. my bowels contained in my belly; which are the seat of the affections, and fountains of support and nourishment to the whole body. Thus the whole man, both soul and body, inside and outside, are consumed.