27 What do you say now, the Head with the Members? “Let them shout for joy and be glad that favour My righteous cause:” who cleave to My Body. Yea, let them say “continually, Let the Lord be magnified, which has pleasure in the prosperity of His servant”. “And my tongue shall speak of Your righteousness, and of Your praise all the day long”. And whose tongue endures to speak the praise of God all the day long? See now I have made a discourse something longer; you are wearied. Who endures to praise God all the day long? I will suggest a remedy, whereby you may praise God all the day long if you will. Whatever you do, do well, and you have praised God. When you sing an hymn, you praise God, but what does your tongue, unless your heart also praise Him? Have you ceased from singing hymns, and departed, that you may refresh yourself? Be not drunken, and you have praised God. Do you go away to sleep? Rise not to do evil, and you have praised God. Do you transact business? Do no wrong, and you have praised God. Do you till your field? Raise not strife, and you have praised God. In the innocency of your works prepare yourself to praise God all the day long.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)