מדרש על מלכים א 16:34

"With his first-born son shall he lay its foundations, and with his youngest shall he plant its gates." And thus is it written (I Kings 16:34) "In his (Achav's) days Chiel of Beth-el built Jericho. With his first-born son he laid its foundations, and with his youngest son he planted its gates." I might think that (Joshua swore thus) unintentionally; it is, therefore, written (Ibid.) "according to the word of the L-rd that He had spoken through Joshua the son of Nun."