these are: 1 Samuel 27:2, 1 Samuel 27:6; 2 Samuel 1:1, 2 Samuel 4:10
while he yet: etc. Heb. being yet shut up, Sometimes, in the East, when a successful prince endeavoured to extirpate the preceding royal family, some of them escaped the slaughter, and secured themselves in an impregnable fortress, or in a place of great secrecy; while others have been known to seek an asylum in a foreign county, from when they have occasioned, from time to time, great anxiety and great difficulties to the usurper of the crown. The expression shut up, so often applied to the extermination of eastern royal families (Deuteronomy 32:32. 1 Kings 14:10; 1 Kings 21:21. 2 Kings 9:8; 2 Kings 14:26), strictly speaking, refers to the two first of these cases; but the term may be used in a more extensive sense, for those who, by retiring into deserts, or foreign countries, preserve themselves from being slain by the men who usurp the dominions of their ancestors. Thus the term is here applied to David, though he did not shut himself up, strictly speaking, in Ziklag. It is described as a town in the country, and was probably an unwalled town; and it is certain that he did not confine himself to it, but, on the contrary, was continually making excursions from thence.
the mighty: 1 Chronicles 11:10, 1 Chronicles 11:19, 1 Chronicles 11:24-25