Midrash su I Re 17:16

Another explanation of The blessing of the Lord, it maketh rich. This refers to Elijah’s blessing in the home of (the widow of) Zarephath, as is said: The jar of meal shall not be spent, neither shall the cruse of oil fail, until the day that the Lord sendeth rain upon the land (I Kings 17:14). Though many jars were filled and much meal was ground, yet the jar of meal shall not be spent, etc. Hence, the blessing of the Lord, it maketh rich, and toil addeth nothing thereto implies that she was blessed in her own home.

"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."