Bible Verses About Sieges: Repaired and newly fortified beforehand

Also he strengthened himself, and built up all the wall that was broken, and raised it up to the towers, and another wall without, and repaired Millo in the city of David, and made darts and shields in abundance.

Ye have seen also the breaches of the city of David, that they are many: and ye gathered together the waters of the lower pool.

And ye have numbered the houses of Jerusalem, and the houses have ye broken down to fortify the wall.

Draw thee waters for the siege, fortify thy strong holds: go into clay, and tread the morter, make strong the brickkiln.