My heart is sore pained within me. The attacks of his enemies (Psalms 55:3) deeply grieve and pain the heart of the psalmist. It is not as if they were foreigners, whose hostility was to be expected.
They are his own countrymen; one of them is his own familiar friend (Psalms 55:12). Yet they threaten his life. And the terrors of death are fallen upon ms. When a king is the object of a conspiracy, he well knows, especially in the East, that nothing but his death will satisfy the conspirators.
So on David, long before he made up his mind to quit Jerusalem (2 Samuel 15:14), the "terrors of death" must have fallen.