Question: May Allah be good to you O, Shaikh. The one who prolongs the sitting for Tashahhud for the purpose of supplication at the end of prayers and he prolongs it a lot. [What is the ruling on that]?
Answer: “It is not necessary for him. It is necessary for him to be moderate in the amount of legislated supplication. He should not bore the people with elongation nor shorten it”.
[Sharh Wadhaaif Ramadan (pg. 251)]
Faisal bin Abdu Qaadir bin Hassan