Bede : But salt without measure. Everything that pertains to the rite, etc. It is agreed by all that salt signifies wisdom, whence in common speech dull-witted people are called tasteless; but it matters what kind of salt it is. For the Lord also commanded that in every sacrifice salt be offered (Levit. II), and in the Gospel He says: Have salt in yourselves and be at peace with one another (Mark IX). Nor is it in vain that David is read to have struck the Edomites in the Valley of Salt, because surely we are commanded to offer the salt of heavenly wisdom, by which catechumens are initiated, in all our works' sacrifices. David indeed strikes the Salt Pans of the valleys with their inhabitants, as Christ destroys weak and worldly wisdom along with its followers. Hence it is well ordered now that salt be given diligently without measure in the house of the God of heaven; because it is surely necessary that whatever wisdom anyone has, they should exhibit it all in service to their Creator. And it is to be recalled that the Samaritans, writing to another Artaxerxes, were said to have mentioned the salt they had eaten in the palace, and therefore could not tolerate that the temple and the city of God be built against his interests. But now here Artaxerxes commands all the guardians of the public treasury, among other donations, to give their salt to the house of the God of heaven as much as is needed. For it is recognized there that heretics sometimes are emboldened to attack the Church with the deceitful taste of human wisdom. But here it is implied that those converted to the faith at the same time as wisdom often assist that very faith through the discipline of the same secular wisdom, as they more powerfully conquer its adversaries through it. — Commentary on Ezra and Nehemiah