"Besalel... did everything that G-d commanded Moshe". Even things that Moshe Rabbenu, 'a"h, (Moses) had not conveyed to Besalel, he still did intuitively and, therefore, Moshe Rabbenu blessed him and those who were involved in the building of the Mishkan.
What did Moshe Rabbenu bless them with? They were already physically strong, wise and wealthy. He said to them: "May it be G-d's will that the Shechinah (G-d's Holy Presence) will rest upon the works of your hands”. What did this mean? The following parable in the Gemarra of Ta'anith explains it. It says:
To what may this be compared? To a man who was travelling in the desert. He was hungry, weary and thirsty. He came upon a tree whose fruits were sweet, whose shade was pleasant, and had a stream of water flowing beneath it. He partook of its fruits, drank the water, and rested beneath its shade. When he was ready to continue his journey he said to the tree: "O tree, what can I bless you with? If I would say to you, "May your fruits be sweet", they are sweet already, "May your shade be pleasant", it is already, "May a stream of water flow below you", the stream already flows below you. Therefore I bless you by saying "May it be His Will that all the shoots that come from you will be like you".
So too, in this case, they were already strong, wise and wealthy. Moshe Rabbenu, 'a"h, blessed them that just as the Shekhinah rested upon them, so too may it rest on the works of their hand, which were their children.
(See Kether Saddiq, Parashath Pequdei)
