If their work lags, it is because they are not fed.
3 seconds sound clip from the The Ten Commandments (1956) movie soundboard.
You can hear this line at 00:35:14.787 in the Blu-ray version of the movie.
Quote context
[...]
- The Lord has renewed my strength and lightened my burdens.
- He would have done better to remove them.
- Are you a master builder or a master butcher?
- If we stopped moving stones for every grease woman who falls, the city would never rise.
- If the slaves are not driven they will not work.
- If their work lags, it is because they are not fed.
- The Pharaohs like their images cut deep.
- You know it is death to strike an Egyptian?
[...]