Charles Ellicott Commentary Exodus 35:21

"And they came, every one whose heart stirred him up, and every one whom his spirit made willing, [and] brought Jehovah`s offering, for the work of the tent of meeting, and for all the service thereof, and for the holy garments." — Exodus 35:21 (ASV)

THE ZEAL OF THE PEOPLE IN OFFERING AND ASSISTING IN THE WORK.

They came, every one whose heart stirred him up. —All classes came, men and women (Exodus 35:22), rich and poor, rulers (Exodus 35:27), and those whose only skill was to spin with their hands (Exodus 35:25). And the great majority gave freely—to the utmost of their power. Still it is implied, both here and in Exodus 35:22 and Exodus 35:29, that there were some whose hearts did not stir them up. Enough and to spare, was, however, contributed, and at last the people had to be restrained from bringing (Exodus 36:8).

The Lord’s offering—i.e., “their offering to Jehovah.”