his Farḍ would become invalid. Similarly, if he did not do Qirā`at in any of or both of the first two Rak’āt, his Ṣalāĥ would be invalid.

(Baĥār-e-Sharī’at, vol. 1, pp. 743; ‘Ālamgīrī, vol. 1, pp. 139)

Rulings on Ṣalāĥ started with intention of four Rak’āt instead of Qaṣr

If a traveller made the intention of offering four Rak’āt Farḍ Ṣalāĥ instead of Qaṣr [shortened Ṣalāĥ] by mistake but realized it during the Ṣalāĥ and offered Salām after two Rak’āt, his Ṣalāĥ would be valid. Similarly, if a resident made the intention of offering two Rak’āt of Farḍ instead of four but completed four Rak’āt and offered Salām afterwards, his Ṣalāĥ would be valid.

The honourable scholars of Islamic jurisprudence رَحِمَهُمُ الـلّٰـهُ تَـعَالٰی have stated: It is not necessary to specify the number of Rak’āt when making the intention of Ṣalāĥ as it is implicit. Hence, a mistake in the specification of the number of Rak’āt during the intention does not affect Ṣalāĥ.

(Durr-e-Mukhtār, vol. 2, pp. 120)

Travelling Imām and resident Muqtadī (follower)

[When offering Ṣalāĥ with Jamā’at] it is also an essential requirement for the follower to know whether the Imām is a