Eleazar was one of the Three Mighty Warriors

David's Mighty Warriors

David's Mighty Warriors are a group of biblical characters explicitly singled out by an appendix of the Books of Samuel. The text divides them into the "Three", of which there are three, and "Thirty", of which there are more than thirty...

 and an officer under David

David

David was the second king of the united Kingdom of Israel according to the Hebrew Bible and, according to the Gospels of Matthew and Luke, an ancestor of Jesus Christ through both Saint Joseph and Mary...

, according to 2 Samuel

Books of Samuel

The Books of Samuel in the Jewish bible are part of the Former Prophets, , a theological history of the Israelites affirming and explaining the Torah under the guidance of the prophets.Samuel begins by telling how the prophet Samuel is chosen by...

 and 2 Chronicles

Books of Chronicles

The Books of Chronicles are part of the Hebrew Bible. In the Masoretic Text, it appears as the first or last book of the Ketuvim . Chronicles largely parallels the Davidic narratives in the Books of Samuel and the Books of Kings...

. His father was Dodai or Dodo, and he was a Benjamite

Tribe of Benjamin

According to the Hebrew Bible, the Tribe of Benjamin בִּנְיָמִין was one of the Tribes of Israel.From after the conquest of the land by Joshua until the formation of the first Kingdom of Israel in c. 1050 BCE, the Tribe of Benjamin was a part of a loose confederation of Israelite tribes...

 through his ancestor Ahoah

Ahoah

Ahoah - brotherly, one of the sons of Bela, the son of Benjamin . He is also called Ahiah and Iri . His descendants were called Ahohites ....

.

While fighting the Philistines at Ephes Dammim alongside Jashobeam

Jashobeam

Jashobeam , also called Josheb-Basshebeth and possibly Adino the Eznite , was chief of the Three Mighty Warriors and an officer under David in charge of 24,000 men according to the Second Book of Samuel and the First Book of Chronicles . Jashobeam was a Benjamite from Hakmon...

 and Shammah

Shammah

In the Bible, Shammah was the son of Agee, a Haratite, and one of King David's three legendary "mighty men".His greatest deed was the defeat of a troop of Philistines...

, the other two warriors of the Three, Eleazar fought so long and hard his hand clamped onto his sword.

Eleazar, as part of the Three, broke through Philistine lines in Bethlehem

Bethlehem

Bethlehem is a Palestinian city in the central West Bank of the Jordan River, near Israel and approximately south of Jerusalem, with a population of about 30,000 people. It is the capital of the Bethlehem Governorate of the Palestinian National Authority and a hub of Palestinian culture and tourism...

 to get a drink for David from a well near the gate while they were encamped in the Cave of Adullam

Cave of Adullam

The Cave of Adullam was originally a stronghold referred to in the Old Testament, near the town of Adullam, in which David, already anointed to succeed Saul as king, sought refuge from the latter . The word "cave" is usually used but "fortress", which has a similar appearance in writing, is used as...

, but David poured the water out as a drink offering

Drink offering

The drink offering was a form of libation forming one of the sacrifices and offerings of the Law of Moses.-Etymology:The Hebrew noun nesek is formed from the Qal form of the verb nasak, "to pour," hence "thing poured." The verb and the noun frequently come together, such as nasak et-nesek,...

 to Yahweh

Yahweh

Yahweh is the name of God in the Bible, the God of Abraham, Isaac, Jacob, Jews and Christians.The word Yahweh is a modern scholarly convention for the Hebrew , transcribed into Roman letters as YHWH and known as the Tetragrammaton, for which the original pronunciation is unknown...

, saying, "Is it not the blood of men who went at the risk of their lives?"