Ethics of the Fathers Chapter Two

Rabbi Tarfon would say: The day is short, the work is much, the workers are lazy, the reward is great, and the Master is pressing. He would also say: It is not incumbent upon you to finish the task, but neither are you free to absolve yourself from it. If you have learned much Torah, you will be greatly rewarded, and your employer is trustworthy to pay you the reward of your labors. And know, that the reward of the righteous is in the World to Come.