Saying Any Prayers Between The Fard And The Sunnat Diminishes The Thawab Of Salat

While explaining the nature of azkar, it is written in Maraqilfalah and in the explanation of Tahtawi: "It is sunnat [1] in the Hanafi Madhhab [2] to stand up and perform the sunnat right after the fard without saying anything in between. After performing the fard [3], our Prophet used to sit as long as it took him to say Allahumma antas-salam wa minkas-salam tabarakta ya zal' jalali wal' ikram; then, he began to perform the sunnat right away. He would not say the Ayat-al-kursi or the tesbihs between the fard and the sunnat. Saying them after the sunnat produces the same thawab (reward) as would be produced by saying them after the fard. The same rule is valid for the sunnat before the fard; saying any prayers between the fard and the sunnat diminishes the thawab of salat.

It is makruh [4] for the imam (who leads prayer) to perform the final sunnat in the same place where he performed the fard. It is not makruh for the jama'at (congregation), but it is mustahab [5] for them to perform it at some other place (in the mosque). The salat of a person who neglects the mustahab will not be deficient, but he will be deprived of its thawab. After performing the fard if there is no final sunnat after the fard, or after the final sunnat, it is mustahab for the imam to turn right or left or towards the jama'at. He may as well leave the mosque at once if he has some work to do.

It is stated in a hadith-i-sharif [6], "If a person says, 'Astaghfirullah-al'azim allazi la ilaha illa huw-al-hayy-al-qayyuma wa atubu ilayh', after every prayer of salat, all his sins will be forgiven. " Also it is mustahab (for the imam and for the jama'at) to say the Ayat-al-kursi, to say the tasbihs, and then to raise their hands as high as their chest and pray for themselves and for all Muslims. A hadith declares, "Prayers sent after the five daily fard salat will be accepted. " But the prayers must be done with a vigilant heart and silently.

[1] sunnat: i) act, thing that was, though not commanded by Allahu ta'ala, done and liked by the Prophet ('alaihi 's-salam) as an 'ibada (there is thawab if done, but no sin if omitted, yet it causes sin if continually omitted and disbelief if disliked; the Sunna; i) (with fard) all the sunnas as a whole; ii) (with the Book or Qur'an al-karim) the Hadith ash-sharif; iii) (alone) fiqh, Islam.
[2] madhhab: all of what a profound 'alim of (especially) Fiqh (usually one of the four-Hanafi, Shafi'i, Maliki, Hanbali) or iman (one of the two, namely Ash-ari, Maturidi) communicated.
[3] fard: an act or thing that is commanded by Allahu ta'ala in the Qur'an al-karim. Fard (or fard) means (any behaviour or thought or belief which is) obligatory. Islam's open commandments are called fard (pl. faraid).
[4] makruh: (act, thing) improper, disliked and abstained by the Prophet ('alaihi 's-salam); makruh tahrima: prohibited with much stress.
[5] mustahab: (act, thing) deserving thawab if done but no sin if omitted, nor disbelief if disliked.
[6] hadith (sharif): i) a saying of the Prophet ('alaihi 's-salam).; al-Hadith ash-sharif: all the hadiths as a whole; ii) 'ilm al-hadith; iii) Books of the hadith ash-sharif. iv) Al-hadith al-qudsi, as-sahih, al-hasan: kinds of hadiths (for which, see Endless Bliss, II).