´It was narrated from Abu Sa'eed Al-Khudri that:` The Messenger of Allah said: "The key to prayer is purification, its opening is to say Allahu Akbar and its closing is to say As-salamu 'alaikum."
Hadith Referenceسنن ابن ماجه / كتاب الطهارة وسننها / 276
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:حسن
Hadith Takhrij«سنن الترمذی/الصلا ة 62 ( 238 ) ، ( تحفة الأشراف : 4357 ) ( صحیح ) » ( یہ سند ابو سفیان طریف سعدی کی وجہ سے ضعیف ہے ، لیکن سابقہ حدیث کی بناء پر یہ صحیح ہے )
1؎: «تحریم»: It can mean entering into the sanctity of prayer, and «تحلیل»: it can also mean exiting from the sanctity of prayer, that is, entry into prayer is only through the takbir (opening declaration of "Allahu Akbar") and exit from prayer is only through the taslim (salutation of peace). From this hadith, it is understood that the door of prayer is closed, and the servant can only open it with purification (taharah), meaning that one cannot perform prayer without ablution (wudu) and purification. Similarly, a person can only enter into prayer by saying «اللہ اکبر», and can only exit from it by saying «السلام علیکم».
´Abu Sa'eed narrated that :` Allah's Messenger said: "the key to Salat is the purification, its Tahrim is the Takbir, and its Tahlilis the Taslim, and there is no Salat for one who did not recite Al-Hamd and a Surah in the obligatory (prayer) or other prayers."
Shaykh Dr. Abdur Rahman Freywai
1: That is: When the Prophet (sallallahu alayhi wa sallam) said, "Its conclusion is the taslim (salutation of peace)," this statement will not be interpreted in any other sense.
Note: (In the chain of narration, Sufyan ibn Waki‘ is saqit al-hadith (unreliable in hadith), and Tarif ibn Shihab Abu Sufyan Sa‘di is weak, but this hadith is strengthened by the hadith of Ali (radi Allahu anhu) (no. 3), and thus it is authentic.)
Source: Sunan al-Tirmidhi – Majlis ‘Ilmi Dar al-Da‘wah, New Delhi Edition, Page: 238