Ebenezer

Stone of help, the place where Samuel erected a monument, in grateful remembrance of the divine help, given in answer to prayer, in a great battle with the Philistines. The same place had before witnessed the defeat of Israel and the capture of the ark, 1 Samuel 4:1; 5:1; 7:5-12.

Source: ATS Bible Dictionary
Ebenezer

(stone of help ), a stone set up by Samuel after a signal defeat of the Philistines, as a memorial of the "help" received on the occasion from Jehovah. (1 Samuel 7:12) Its position is carefully defined as between Mizpeh and Shen.

Source: Smith's Bible Dictionary