Answered by Ustadh Salman Younas
Question: I have the habit after making a supplication to send salam to the Prophet (Peace be upon him) and afterwards ask Allah to accept my reciting of Fatiha and let the reward go to all the Prophets. Is it permissible?
Answer: assalamu `alaykum
Yes, it is permissible to donate reward in such a manner. For a detailed answer on this, please refer to the following:
Checked & Approved by Shaykh Faraz Rabbani