Psalms 51:8 - Coke's Commentary on the Holy Bible

Make me to hear joy and gladness— The displeasure which God expressed against the sins he had been guilty of, and the deep sense he had of the aggravated nature of them, filled him with such pains and agonies of mind, that he compares them to that exquisite torture which he must have felt had all his bones been crushed: for the original word דכית dikkitha, signifies more than broken; viz. being entirely mashed: and he compares the joy which God's declaring himself fully reconciled to him would produce in his mind, to that inconceivable pleasure which would arise from the instantaneous restoring and healing of those bones after they had been thus broken and crushed to pieces.