בראשית כד:כה פירוש: רש״י, רשב״ם, ספורנו ורד״ק

מספוא PROVENDER — All kinds of camels’ food is called מספוא e. g., straw and barley.

גם תבן, also straw, something which you did not inquire about as well as lodging, something which you did inquire about. It is a habit of Scriptures to use the word גם, “also,” repeatedly, even if this is not strictly necessary in order to correctly understand the text.

גם תבן גם מספוא, not only do we have room for the camels but we also have feed for them.