Obligatory Sajdahs in the Holy Qur'an
1102. The following Surahs of the holy Qur'an, contains the verses with obligatory Sajdah:
Whenever a person recites the verse or hears it when recited by someone else, he should perform Sajdah immediately when the verse ends, and if he forgets to perform it, he should do it as and when he remembers. There is no difference if one hears the verse directly from someone who is reciting it or via loud speaker or radio. Similarly, as per precautionary measures, rulings is same for someone who hears it without any expectation, in an involuntary situation.
1103. If a person hears the Sajdah verse, and recites it himself also, he should perform two Sajdahs.
1104. If a person hears a verse of Sajdah, while he is in Sajdah other than that of Namaz, or recites it himself, he should raise his head from that Sajdah, and perform another one.
1105. If a person hears the verse of obligatory Sajdah from a child who cannot differentiate between good and bad or from someone who does have an intention of reciting the Qur'an, as per obligatory precaution, one should perform Sajdah. Similarly, the Sajdah will be obligatory if he listens to a taped recitation.
1106. The place where a person performs an obligatory Sajdah upon hearing the verse, should not be a usurped one. However, it is not necessary to be in Wudhu or Ghusl, or to face Qibla, nor is it necessary to conceal one’s private parts or to ensure that the body and the place where he has to place his forehead are Pak. Moreover, the conditions for dress in Namaz do not apply to the performance of these obligatory Sajdah. But if his dress is a usurped one, and performing Sajdah in that considered as using that dress, Sajdah will be void.
1107. As per obligatory precaution, the obligatory Sajdah caused by the Qur'anic verse, a person should place his forehead on a Mohr, or any other thing on which Sajdah is allowed, and as per recommended precaution, also one should keep other parts of one’s body on the ground, as required in a Sajdah of prayers.
1108. When a person performs the obligatory Sajdah upon hearing the relevant verse, it will be sufficient even if he does not recite any Zikr. However, it is Mustahab and is according to precaution to recite Zikr, preferably the following: La ilaha illal lahu Haqqan Haqqa; La ilaha illal lahu Imanan wa Tasdeeqa; la ilaha illal lahu 'Ubudiyyatan wa Riqqa; Sajadtu laka ya Rabbi Ta'abbudan wa Riqqan la Mustankifan wa la Mustakbiran Bal Ana 'Abdun Zalilun Dha'ifun Kha'ifun Mustajeer.