Question

Assalam alaikum

Mashallah the tajweed website is very useful for those teaching and learning tajweed. I would like to know if there is any reference available on saying "sadaq-allah-ul-azeem" at the end of recitation. Or saying "sadaqa-rasoolihil-kareem" and reading the darood/salawaat after finishing recitation of any part of alquran.

 Jazakum Allahu khairan

 Answer

Wa alaikum assalaam wa rahmatu Allahi wa barakatuh,

Jazakum Allahu khairan.

There is no reference from the sunnah, the companions of the Prophet, nor the taabi'een on saying either phrase mentioned in the question after recitation. The usage of these phrases was adopted by some much later in time. 

Allah always speaks the truth, and the words of the Qur’an are the truth, but the usage of these two phrases are from the sunnah.

For any ruling on the usage of these phrases, please refer to a scholar that can issue fatwas.