to make a habit of that; rather, one should only do so from time to time.
The worshipper may seek refuge with Allah when he recites a verse that speaks of punishment, ask Allah for His favor when he recites a verse that speaks of mercy, and invoke blessings upon the Prophet whenever he is mentioned—for sending blessings upon him at the moment of his mention is emphatically encouraged.
These are some of the matters that are recommended or permissible for you to practice during the prayer. We have presented them to you in the hope that you will benefit from them and put them into action, so that you may have clear insight into your religion. We ask Allah for ourselves and for you to grant us further beneficial knowledge and righteous deeds.
And know that the prayer is a mighty act of worship; nothing may be done or said in it except within the bounds laid down by the Messenger. Therefore, give it your full attention, learn what perfects it and what detracts from it, and strive to perform it in the most complete manner possible.