The Place of Supplication in Prayer: Before or After the Closing Salam

Question:
And be pleased with drinking the supplication? O Allah, help us to remember Your Book. Yes. Is the tashahhud after the final tashahhud, or after the prayer?

Answer:
It is permissible to do it before the taslim, and it is permissible to do it after the taslim. Among the scholars, some say it is before the taslim, such as Shaykh al-Islam Ibn Taymiyyah, and some say it is after the taslim, such as al-Hafiz Ibn Hajar (may Allah have mercy on him). The conclusion is that it is permissible in the aftermath of the prayer; it is permissible at the end of the prayer and it is permissible after the prayer, because the term "aftermath" (dabr) can mean both. It can mean both. Shaykh al-Islam Ibn Taymiyyah and Ibn al-Qayyim say that supplication within the act of worship itself is better than supplication outside the act of worship.
This is a viewpoint: that supplication within the act of worship is better than supplication outside the act of worship. Therefore, they said it should be done before the taslim.