Saying,
Touch not my anointed, and do my prophets no harm.
Read Chapter 105
Augustine of Hippo
AD 430
8. "What time as they went from one nation to another, from one kingdom to another people" (ver. 13). This is a repetition of what he had said, "from one nation to another." "He suffered no man to do them harm: but reproved even kings for their sakes" (ver. 14). "Touch not," He said, "Mine anointed, and do My prophets no harm" (ver. 15). He declareth the words of God chiding or reproving kings, that they might not harm the holy fathers, while they were small in number, very few, and they strangers in the land of Canaan. Although these words be not read in the books of that history, yet they are to be understood as either secretly spoken, as God speaketh in the hearts of men by unseen and true visions, or even as announced through an Angel. For both the king of Gerar and the king of the Egyptians were warned from Heaven not to harm Abraham, and another king not to harm Isaac, and others not to harm Jacob; while they were very few, and strangers, before he went over into Egypt to sojourn...
Prophets. The word anointed is thus explained, as the patriarchs were not kings over any but their own families, though they were equal in riches to many kings. They foresaw future events, and offered sacrifice to God, as priests, in which sense also they may be styled anointed. No visible unction, but the divine appointment, might be requisite. God protected them in a wonderful manner, and selected them for his peculiar people. (Calmet) (Hebrews xi. 8.)