Sforno on Exodus 39:3/ספורנו על שמות ל״ט:ג׳

1וירקעו את פחי הזהב, the donours of the gold for the priestly garment already flattened the gold into thin stripes so they could easily be converted and cut into “threads” to be embroidered in these garments.

2וקצץ פתילים, the respective artisan. He used the flat sheets of gold to cut the threads from.