مسائل المنتخبه (Articles Of Islamic Acts) - الخوئي، السيد أبوالقاسم - الصفحة ٢٧٢ - SAJDATUS SAHU (PROSTRATION FOR FORGOTTEN ACTS)

Surah al Hamd or surah). (c) Standing up by mistake when one ought to sit (e.g. while reciting tashahhud). In these conditions "e should, on the basis of obligatory precaution, perform ٢ prostrations. And the recommended precaution is that ٢ prostrations should be performed for every addition or omission which is made in the prayers inadvertently. And orders regarding these matters are narrated in the following Articles:
١٢٤٦. If a person talks by mistake or under the impression that his prayers has come to an end he should perform ٢ sajdatus sahu.
١٢٤٧. Sajdatus sahu is not obligatory for the sound which is produced by sighing and coughing. However, if,for example he says Ah! or Oh! by mistake he shouldperform sajdatus sahu.
١٢٤٨. If a person recites something wrongly by mistake and then recites it correctly it is not obligatory for him to perform sajdatus sahv for having recited thatthing for the second time.
١٢٤٩. If a person offering prayers talks for some time by mistake and usually it is considered to be talking once only it is sufficient, after salaam of prayers, tooffer ٢ prostrations.
١٢٥٠. If a person does not pronounce the tasbihat Arbaah by mistake the recommended precaution is that he should perform ٢ sajdatus sahu after his prayers.
١٢٥١. If at a place where the salaam of prayers is not to be said a person says by mistake: "Assalamu alayna wa ala ibadil lah salihin" or says: "Assalamu alaykum" he should perform ٢ sajdatus sahu.
١٢٥٢. If a person says by mistake, all the ٣ salaams at a place which salaam should not be said it is sufficient to perform ٢ sajdatus sahu.
١٢٥٣. If a person forgets one prostration or tashahhud and recollects this before the bowing of the next unit, he should "turn and perform it. And after the prayershe should, on the basis of obligatory precaution, offer two sajdatus sahv for standing (Qiyam) unnecessarily.