ישראל בני עשו כן משה את ‘ה צוה אשר ככל" המלאכה כל את משה וירא ;העבדה כל את אתם ויברך עשו כן ‘ה צוה כאשר אתה עשו והנה (מג-מב לט) "משה
The Chasam Sofer explained: That is why it says "kein asu Bnei Yisrael es kol ha’avodah" and not "es kol hamelachah," to teach us that Bnei Yisrael brought their donations to the avodah of the Mishkan for the sake of avodas Hashem. And as it says (Devarim 13:5): "V’Oso sa’avdu." The Torah adds and explains that Moshe concluded that Bnei Yisrael had brought their donations l’Shem Shamayim and that is why he blessed them. We learn from this that those who carried out the meleches haMishkan were able to do it with shleimus – "ka’asher tzivah Hashem kein asu." Because if Bnei Ysirael would not have brought their contributions wholeheartedly, those who they sent – the ones who did the melachah – would not have been able to carry out their task with shleimus. As Chazal teach us (Brachos 34b), when a shaliach tzibbur errs while davening, it is a bad sign for those who send him, because the "emissary of a person is like the person himself." So, too, the shaliach tzibbur who succeeded in the task that the tzibbur imposed on him reflects well on those who sent him.
Toras Moshe
