Ruling 1094. If a person intentionally breaks the sequence of prayers – for example, he recites the other surah before Sūrat al-Ḥamd, or he performs sajdah before rukūʿ – his prayer becomes invalid.

Ruling 1095. If a person forgets a rukn of the prayer and performs the rukn that comes after it – for example, before performing rukūʿ he performs two sajdahs – then based on obligatory precaution, his prayer is invalid.

Ruling 1096. If a person forgets a rukn and performs the act after it which is not a rukn – for example, before performing two sajdahs he says tashahhud – he must perform the rukn and then perform again what he mistakenly performed before it.

Ruling 1097. If a person forgets something that is not a rukn and performs the rukn that comes after it – for example, he forgets Sūrat al-Ḥamd and starts performing rukūʿ – his prayer is valid.

Ruling 1098. If a person forgets something that is not a rukn and performs the act that comes after it that is not a rukn either – for example, he forgets Sūrat al-Ḥamd and recites the other surah – he must perform the act he forgot and then perform the act he mistakenly performed before it.

Ruling 1099. If a person performs the first sajdah thinking that it is the second sajdah, or if he performs the second sajdah thinking that it is the first, his prayer is valid. [The sajdah he deems as] his first sajdah is counted as the first sajdah, and [the sajdah he deems as] his second sajdah is counted as the second sajdah.