Chapter 48 of the Rule on the daily manual labour

CHAPTER XLVIII.
Of daily manual labour.
Idleness is an enemy of the soul. Therefore the Brethren ought to be employed at certain times in labouring with their hands, and at other fixed times in holy reading. Wherefore we think that both these occasions may be well ordered thus: From Easter till the first of October, let them, on going forth from Prime, labour at whatever they are required till about the fourth hour. From the fourth, till close upon the sixth hour, let them be employed in reading. On rising from table after the sixth hour, let them rest on their beds with all silence, or if perchance any one shall desire to read, let him read in such a way as not to disturb any one else.
Let None be said seasonable, at about the middle of the eighty hour, and after that let them work at what they have to do till the evening. If the situation of the place, or their poverty require them to labour in reaping their corn, let them not be saddened thereat, for then are they Monks in very deed, when they live by the labour of their hands, as our Fathers and the Apostles did before us. Yet let all things be done with moderation for the sake of the fainthearted
From the first of October till the beginning of Lent, they shall be employed in reading till the second hour complete, when Tierce shall be celebrated, and from that till the ninth hour, let them labour at whatever work is enjoined them. At the first signal of the ninth hour, let them all leave off work, so as to be ready when the second signal is given. After their refection they shall be employed in reading spiritual books, or the psalms.
But in Lent they must read from morning till the third hour complete, then let them work till the end of the tenth hour, at what is enjoined them. In these days of Lent, let each one have a book from the Library, and read it all through in order. The books must be given at the beginning of Lent. Let one or two Seniors be specially appointed to go about the Monastery at the hours in which the Brethren are employed in reading, and see that no one be slothful or give himself up to idleness or foolish talk, and neglect his reading, being thus not only unprofitable to himself, but also a hindrance to others. If such an one be found (which God forbid!) let him be reprehended once or twice, and if he do not amend, let him be so severely corrected, that others may take warning by it. Neither let one Brother associate himself with another at unseasonable times.
On Sunday all shall devote themselves to reading, except such as are deputed for the various offices. But if any one shall be so negligent and slothful as to be either unwilling or unable to meditate or read, let him have some work imposed upon him which he can do, and thus not be idle. To the Brethren who are of weak constitution or in delicate health, such work or art shall be given as shall ekp them from idleness, and yet not oppress them with so much labour as to drive them away. Their weakness must be taken into consideration by the Abbot.