Genesis 42:25

Their sacks. The first word translated “sacks,” keli, means “vessels” or “receptacles,” and may have signified a basket or other container. The second word “sack,” into which the money was placed, is a transliteration of the Hebrew sag, which has found entrance into the European languages through the Greek sakos and the Latin saccus. Besides these terms another old word for “sack” is used, the Hebrew ‘amtachath. It is employed in the Bible only in connection with this story, and must have been a synonym of sag, because it is used interchangeably with it (vs. 27, 28; ch. 43:12; etc.).

Joseph did not return their money maliciously, but could not bring himself to accept money from his father and brothers for bread. Even if he may have thought it possible that his brothers would be alarmed upon finding the money, he saw no reason for sparing them this anxiety. It would help to soften their hard hearts still more, after the bitter experiences of the preceding days.