Bit Agusi (also written Bet Agus) was an ancient Aramaean Syro-Hittite state, established by Gusi of Yakhan at the beginning of the 9th century BC. It had included the cities of Arpad, Nampigi (Nampigu) and later on Aleppo. Arpad was the capital of the state-kingdom. Bit Agusi stretched from the A'zaz area in the north to Hamath in the south.