The angel of Yahweh said to Manoah, Though you detain me, I won't eat of your bread; and if you will make ready a burnt offering, you must offer it to Yahweh. For Manoah didn't know that he was the angel of Yahweh.
The writer recorded no Israelite cry for help from the Philistine oppressors. Later we shall see that the Israelites did not cooperate with Samson in opposing this enemy. The Philistines appear to have been attractive neighbors. The Israelites cooperated with them readily instead of opposing them and driving them from the Promised Land.