Rashi on Exodus 5:7/רש"י על שמות ה׳:ז׳

1תבן STRAW — In old French estouble; English stubble. They used to knead this into the clay.

2לבנים BRICKS — old French tuiles: English tiles, which they make from clay and dry in the sun; sometimes they are burnt in a kiln.

3כתמול שלשם means as you have been doing UP TILL NOW (not “yesterday and the day before” as is the literal meaning, but merely “formerly”).

4וקששו means AND LET THEM GATHER.