The prophet saith: Seven times a day have I given praise to thee.¹ We shall observe this sacred number of seven, if we fulfil the duties of our service in the Hours of Lauds, Prime, Terce, Sext, None, Vespers and Compline; for it was of these day Hours that he said: Seven times a day have I given praise to thee.1 But of the Night Office the same prophet saith: I arose at midnight to give praise to thee.² At these times, therefore, let us render praise to our Creator for the judgements of his justice: that is, at Lauds, Prime, Terce, Sext, None, Vespers and Compline; and let us rise in the night to praise him.

¹Ps cxviii, 164
²Ibid 62