Or HaChaim on Exodus
ויצאו כל עדת בני ישראל מלפני משה. The whole congregation of Israelites departed from the presence of Moses. The Torah emphasises that they all left simultaneously, eager to bring their contributions for this sacred project.
Rabbeinu Bahya
ויצאו כל עדת בני ישראל ...ויבואו, “the whole of the assembly of the Children of Israel departed...and they came, etc. This verse describes the eagerness with which the Jewish people responded to Moses’ request, and how they brought their respective gifts immediately.
Rav Hirsch on Torah
V. 20. מלפני משה: Sie waren לפני משה versammelt und gingen nun aus der vor Mosche stattgehabten Versammlung.