שמואל ב, פרק י״ז, פסוק כ״ה

A dramatic political and military shift unfolds in Absalom's camp as he appoints a new commander to replace Joab. Beneath this transition lies a complex web of family ties, personal prestige, and eventual bloodshed. Absalom places Amasa in charge of the military forces [מצודת דוד, ביאור שטיינזלץ]. The detailed lineage provided for Amasa highlights his close blood relation to his predecessor: Amasa and Joab were first cousins, the sons of two sisters [רלב״ג]. However, despite this close family bond, history shows that Joab would later not hesitate to murder Amasa in order to reclaim control of the army [רלב״ג].

Amasa's father, Ithra, is noted as a man of high standing, recognized for his excellence, righteousness, and fear of God [רד״ק, מצודת דוד, חומת אנך]. This prominent reputation gives Amasa a distinct social advantage over Joab. While Joab is consistently identified by his mother's name, Zeruiah, because his father was relatively unknown, Amasa carries the prestige of his distinguished father [מלבי״ם].

Ithra is identified as an Israelite, though other historical records refer to him as an Ishmaelite. The primary approach among commentators is that he was originally an Israelite who temporarily relocated to the land of Ishmael. While living abroad, the locals naturally referred to him as the Israelite, but upon his return home, the nickname of the Ishmaelite stuck with him [רד״ק, מצודת דוד]. Beyond this geographic explanation, a separate tradition identifies Ithra as a great scholar [מלבי״ם] who earned the Ishmaelite title by girding his sword in the manner of the Ishmaelites. He did this to threaten anyone who dared to question David's legitimacy to rule due to his descent from a Moabite convert [רד״ק].

Regarding Amasa's mother, Abigal, the narrative implies an unusual marital timeline. The phrasing suggests that Ithra was intimate with her before their formal marriage, and only afterward was Amasa born [רד״ק]. Abigal is introduced as the daughter of Nahash, a figure whose identity sparks discussion. The primary approach among commentators is that Nahash is actually another name for Jesse, David's father. Jesse was considered a flawless individual who died without any personal sin. His death was attributed solely to the ancient decree of mortality brought upon humanity following the original sin with the serpent in the Garden of Eden [רש״י, רד״ק, מצודת דוד, חומת אנך]. Another explanation for this name connects it to military might, as Jesse's descendants produced kings who struck enemy nations with the sudden, lethal force of a viper [רד״ק]. Conversely, an alternative viewpoint argues that Nahash was not Jesse, but rather the first husband of David's mother. According to this perspective, Abigal and Zeruiah were only David's half-sisters through their mother, which explains why Abigal is specifically emphasized as Zeruiah's sister rather than David's [מצודת דוד].