The ruling on consistently raising the hands and making du'a after the obligatory prayer

Question:
Consistently raising the hands and making du'a after the obligatory prayer?

Answer:
What is prescribed is what the Prophet (peace and blessings be upon him) did not do after the obligatory prayer.
Q: Is it considered an innovation?
The Shaykh: It should not be done; one should be informed.
Q: And if one sees someone doing it?
The Shaykh: After the obligatory prayer, one should be informed that this is not appropriate, that it is not prescribed, but rather an innovation. However, if one does it occasionally in the voluntary prayer, the Prophet (peace and blessings be upon him) did it in the voluntary prayer.