'Half sister' in the Bible

‘Cursed is he who is intimate with his [half] sister, whether his father’s or his mother’s daughter.’ And all the people shall say, ‘Amen.’

Three sons of Zeruiah [the half sister of David] were there: Joab, Abishai, and Asahel. Now Asahel was as light and swift-footed as one of the [wild] gazelles in the field.

Amnon became so emotionally distressed that he fell sick over his half-sister Tamar. She was a virgin, and Amnon found it difficult to do anything to her.

Absalom put Amasa in command of the army instead of Joab. Now Amasa was the son of a man named Ithra the Israelite, who had married Abigail the daughter of Nahash, [the half sister of David and] the sister of Zeruiah, Joab’s mother.

He had conferred with Joab the son of Zeruiah [David’s half sister] and with Abiathar the priest; and they followed Adonijah and helped him.

But Jehosheba, the daughter of King Joram [of Judah and half] sister of Ahaziah, took Joash the son of Ahaziah and abducted him from among the king’s sons who were to be killed, and hid him and his nurse in the bedroom. So they hid him from Athaliah, and he was not put to death.

Now David said, “Whoever strikes down a Jebusite first shall be chief and commander.” Joab the son of Zeruiah [David’s half sister] went up first, and so he was made chief.

Zelek the Ammonite, Naharai the Berothite, the armor bearer of Joab the son of Zeruiah [David’s half sister],

Joab the son of Zeruiah was in command of the army, and Jehoshaphat the son of Ahilud was the recorder;