From Monarchists.Wiki

Jael (Hebrew: יָעֵל) was the wife of Heber the Kenite and a heroine among the Israelites.

The Israelite strayed from God's path, so God had the Canaanite king Jabin oppress the Israelites as punishment. However, Jabin was at peace with Jael's Kenite husband Heber.

God commanded his prophet Deborah to gather an army and march to Mount Tabor, where God will draw out Jabin's commander Sisera and deliver him to the Israelites. Deborah summoned Barak, son of Abinoam, and relayed God's instructions and promises to him and informed him that Sisera would be defeated by the efforts of a woman instead of Barak's efforts.

Barak gathered the army, and Deborah, Barak, and the army set off for Mount Tabor. Sisera and his army met them there, and God and the Israelites defeated Sisera, routing them. Barak then pursued and slaughtered them.

Sisera, however, escaped. He fled to Jael's tent. Due to the peace between Jabin and Heber the Kenite, Sisera assumed that he would be safe there. Jael pretended to aid Sisera, and when Sisera fell asleep due to exhaustion, she took a tent peg and drove it through Sisera's head, killing head.

Barak arrived in pursue of Sisera, and Jael directed him to Sisera's corpse. Sisera was killed by a woman, just as God told Deborah. Deborath and Barak then sang in praise of God, His miracles, the history of their people, the soldiers, and Jael, calling Jael the "most blessed of women".

Sisera's defeat was a major blow to Jabin, and the Israelites were ultimately able to defeat him utterly.