ויבאו [וַיָּבֹ֣א] רְחַבְעָם֮ יְרוּשָׁלִַם֒ וַיַּקְהֵל֩ אֶת־כָּל־בֵּ֨ית יְהוּדָ֜ה וְאֶת־שֵׁ֣בֶט בִּנְיָמִ֗ן מֵאָ֨ה וּשְׁמֹנִ֥ים אֶ֛לֶף בָּח֖וּר עֹשֵׂ֣ה מִלְחָמָ֑ה לְהִלָּחֵם֙ עִם־בֵּ֣ית יִשְׂרָאֵ֔ל לְהָשִׁיב֙ אֶת־הַמְּלוּכָ֔ה לִרְחַבְעָ֖ם בֶּן־שְׁלֹמֹֽה׃ (פ)
And when Rehoboam was come to Jerusalem, he assembled all the house of Judah, and the tribe of Benjamin, a hundred and fourscore thousand chosen men that were warriors, to fight against the house of Israel, to bring the kingdom back to Rehoboam the son of Solomon.
Rashi
וישמע בית פרעה AND THE HOUSE OF PHARAOH HEARD IT — The house of Pharaoh means his servants and the members of his household. בית here does not mean an actual house (so that the words would mean “and one heard it in the house of Pharaoh; cf. 5:16), but it is similar to (1 Kings 12:21) בית ישראל “the house of Israel”, or בית יהודה the house of Judah”, meaning the people of Judah. old French maisniede English all the inmates of a house.
From David to Destruction
One need not earn a doctorate in mathematics to realize that ten plus one does not equal twelve. Yet, after Achiyah HaShiloni (Melachim I 11:30-32) tears Yarav'am ben Nevat’s41It is a matter of debate as to whether Achiyah tears his own garment or that of Yarav'am (see Radak to Melachim I 11:29). garment into twelve pieces, he tells Yarav'am to take only ten pieces. Achiyah explains that the ten pieces represent the ten Shevatim (tribes) Yarav'am will rule over and that one Sheivet, presumably represented by a remaining piece of the garment, will remain in the control of Shlomo HaMelech’s descendants. What about the twelfth piece? Moreover, two Shevatim come under the rule of Shlomo’s son Rechav’am, Yehudah and Binyamin (Melachim I 12:21). Why is Sheveit Binyamin not addressed in Achiyah’s Nevu’ah?