5) (Vayikra 9:5): "And they brought what Moses had commanded" — with zeal! "and all the congregation drew near and stood before the L–rd": They all drew near with joy and stood before Him. An analogy: A king grew angry at his wife and sent her away. After several days he was reconciled to her. Immediately, she girded her thighs, braced her shoulders and served him more assiduously than ever. Israel, likewise — when they saw that the L–rd had been conciliated to atone their sins, they all drew near with joy and stood before Him. Thus: "and all the congregation drew near and stood before the L–rd."
Why Israel Ran Toward the Mishkan With Joy
Sifra, Mekhilta deMiluim II 5
[ה] "ויקחו את אשר צוה משה" – בזריזות. "ויקרבו כל העדה ויעמדו לפני השם" – קרבו כולם בשמחה ועמדו לפניו. משל למלך שכעס על אשתו והוציאה. לאחר ימים נתרצה לה. מיד חגרה מתניה, קשרה כתיפיה, והיתה משמשת אותו יותר מדאי. אף כך ישראל. כיון שראו שנתרצה המקום לכפר על עונותיהם – קרבו כולם בשמחה ועמדו לפניו. לכך נאמר "ויקרבו כל העדה ויעמדו לפני השם".