(1) The LORD spoke to Moses: (2) See, I have singled out by name Bezalel son of Uri son of Hur, of the tribe of Judah. (3) I have endowed him with a divine spirit of skill, ability, and knowledge in every kind of craft; (4) to make designs for work in gold, silver, and copper, (5) to cut stones for setting and to carve wood—to work in every kind of craft. (6) Moreover, I have assigned to him Oholiab son of Ahisamach, of the tribe of Dan; and I have also granted skill to all who are skillful, that they may make everything that I have commanded you:
(א) ראה קראתי בשם בצלאל בן אורי בן חור אמר השם למשה ראה קראתי בשם, ומשה אמר לישראל ראו קרא ה' בשם (להלן לה ל). והטעם, כי ישראל במצרים פרוכים בעבודת חומר ולבנים, לא למדו מלאכת כסף וזהב וחרושת אבנים טובות ולא ראו אותם כלל. והנה הוא פלא שימצא בהם אדם חכם גדול בכסף ובזהב ובחרושת אבן ועץ וחושב ורוקם ואורג, כי אף בלומדים לפני חכמים לא ימצא בקי בכל האומניות כלם, והיודעים ורגילים בהם בבא ידיהם תמיד בטיט ורפש לא יוכלו לעשות בהן אומנות דקה ויפה... ולרבותינו בזה מדרש (שמו''ר מ ב) הראה אותו ספרו של אדם הראשון ואמר לו כל אחד התקנתיו מאותה שעה, ואף בצלאל מאותה שעה התקנתי אותו, שנאמר ראה קראתי בשם בצלאל והוא כענין שפירשתי. ועוד אמרו (ברכות נה.) יודע היה בצלאל לצרף אותיות שנבראו בהן שמים וארץ. והענין, כי המשכן ירמוז באלו והוא היודע ומבין סודו:
See that I have designated by name Uri ben Hur:
God said to Moshe, see that I have called by name, and Moshe said to Israel, see that God has called him by name. The reason for this is that the Israelites in Egypt were engaged in hard work with mortar and bricks; they did not learn to work with silver, gold, stone engraving and never even saw these arts. It's therefore miraculous that they would find among them a wise man who can work with all these fine arts and more, because even among those who have studied these arts before the wise, it is not possible to find one who is expert in all of them. Even those who are familiar with these crafts, if they are burdened with the coarse toil of brick and mortar soon lose their dexterity and their ability to execute fine, detailed and beautiful work.
See that I have singled out Betzalel by name: It doesn't say, "I have singled out", but "see that I have singled out". When Moshe went up to be with God on high, Hakadosh Baruch Hu showed him each of the vessels of the Mishkan, and said, "thus shall you make it: make the menorah, make the table, make the altar, for each of the pieces of the Mishkan. When Moshe was getting ready to go down, he thought that he would make them, but God called to him and said, "I have made you into a king, it's not the way of a king to make anything, rather the king decrees and others create. Similarly for you, you don't have permission to make anything, rather you shall tell them and they will make them."
God didn't tell Moshe who would be responsible for making them, and asked God, "Who will make them?" God responded, "I will show you."
What did God do? God showed him the "the book of Adam Harishon", and showed him the inscriptions for each generation that will arise, from Bereishit until the time of the resurrection of the dead, each generation and its kings, each generation and its leaders, each generation and its prophets. God said to Moshe, "each one I have established from that moment (of creation), including Betzalel who I appointed at that time". This is why it says, "See that I have singled out by name Betzalel".
This reiteration of God's selection of Betzalel adds the word, "lehorot", to teach. There are many wise people who have trouble teaching others. Here, it also mentions that Ahaliav, his partner, has been given these abilities so as to teach others through his wisdom. Therefore, it is said about both of them that they shall "do all the work and think the thoughts".