For day and night thy hand was heavy upon me. David sees now that his sufferings at this time came from God, and were a part of the punishment of his sin. They continued without intermission both by day and by night.
His conscience was never wholly at rest. My moisture is turned into the drought of summer; literally, my sap was changed through summer drought; i.e. the vital principle, which had been strong in him, was changed—burnt up and exhausted—by the heat of God's wrath.