If a person joins the imam when he is in the second rakʿah of a four rakʿah prayer, then in his second rakʿah – which is the third rakʿah of the imam – he must sit after the two sajdahs, say tashahhud to the extent that is obligatory, and then stand up. In the event that he does not have enough time [in his third rakʿah] to say al‑tasbīḥāt al‑arbaʿah three times, he must say it once and join the imam in rukūʿ.