C. F. Keil and Franz Delitzsch on Exodus 27:20

Exo 27:20

The sons of Israel were to bring to Moses (lit., fetch to thee) olive oil, pure (i.e., prepared from olives “which had been cleansed from leaves, twigs, dust, etc., before they were crushed”), beaten, i.e., obtained not by crushing in oil-presses, but by beating, when the oil which flows out by itself is of the finest quality and a white colour. This oil was to be “for the candlestick to set up a continual light.”