Sujood At-Tilawah: The Prostration of Recitation
(1) When to prostrate?
When you come across one of the 14 places which have the symbol of prostration (Sujood) in the Quran, while reciting- you do a prostration (a Sajdah).
When you go into prostration while reading the Quran, it is Mustahab (encouraged but not obligatory) to say Allahu Akbar and then do the prostration (only one), and get up.
When you do Sujood At-Tilawah in Salah, it is Wajib (obligatory) to say Allahu Akbar and then do the prostration and then say Allahu Akbar and get up from the prostration.
(2) What dua to say during Sujood At-Tilawah?
Atleast say *Subhana Rabbi Al-‘Ala* once.
There are other lengthy Duas in the Ahadith, you may add that as well.
(3) Should I face the Qiblah and prostrate?
It is Mustahab (encouraged) but not Wajib (Obligatory) to face the Qibla for this Sujood.
(4) Is this Sujood obligatory?
Not obligatory, it is optional and rewarding to do it. No sin for not doing it either while reading the Quran or in prayer.
(5) Is Wudhu (ablution) necessary when doing it if we are reciting the Quran?
Not obligatory.
Source: Islamqa.info
Compiled: Abu Muaaz Mohammed Manna.
Saheehus-Seerah 