Salām bin Abī 'l-Huqayq (Arabic: سلام بن أبي الحقيق) was a Jewish poet of early 7th century Arabia who financed and assisted the Pagan tribes who were fighting the prophet Muhammad. He was killed in the Expedition of 'Abdullah ibn 'Atik. He composed satirical verse (hija') about Muhammad and other early Muslim leaders. When men of the Banu Aus assassinated Ka'b ibn al-Ashraf, some Khazraj tribesman including Abdullah ibn Unays went to Muhammad and received his permission to kill Sallam.
Muhammad ibn Jarir al-Tabari describes the assassination thus:
Sallam was the brother of al-Rabi ibn Abu al-Huqayq and the uncle of the latter's sons, who included Kenana ibn al-Rabi.
Abu Rafi's assassination is mentioned in many Sunni Hadith:
Abu Rafi's assassination is mentioned in: Sahih al-Bukhari, 5:59:370, Sahih al-Bukhari, 5:59:371, Sahih al-Bukhari, 5:59:372 and many more.
al-Tabari, The History of Al-Tabari: Volume 8, Michael Fishbein, tr. (Albany: State University of New York Press, 1997), 482-483.