1] There is no saheeh hadeeth about Salaat al-Tasbeeh

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Brother I wanted to knowthe status and ruling on"Salat-ul-Tasbih" which is explained as is very important and referenced is given from Abu’Dawood& Tirimzi but without the Hadith number and it says"Our Beloved Prophet Muhammed (Sallallaho Alihiwassallam) said to hisuncle (father’s brother) Sayyiduna Abbass (may Allah be pleased with him) Oh uncle shall I not give you Shall I not grant you Shall I not award you Shall I not do mercy on you When you do 10 things Allah will forgive your sins: of the future and of the past; new and old; those you have forgotten and those you did knowingly; big and small; hidden and revealed. Then he (Sallallaho Alihiwassallam)explained the taught the way to pray Salatul Tasbihand then said if you can pray this salah once a day,if you can not pray once a day then every Friday, and even if this is not possible then once a month and even if this is not possible then once a year and even if this is notpossible then at least once in a lifetime (Abu’Dawood & Tirimzi) and it said that this phrase “Subhaan Allahi Wal Hamdulillahi Wa Laa ilaha illal Laahu Wallahu Akbar " should be recited in different steps in Sal’ah to make it to a count of 300. What is the ruling onthis and is this from an authentic source.
Praise be to Allaah.
The scholars (may Allah have mercy on them) differed as to whether Salaat al-Tasbeeh is prescribed in Islam. The reason for this difference of opinion concerning it isthe difference of opinion concerning the soundnessof the hadeeth which speaks of it. The prominent scholars are of the view that it is da‘eef (weak).
1. Ibn Qudaamah (may Allah have mercy on him) said in al-Mughni (1/438):
With regard to Salaat al-Tasbeeh, Ahmad said: I do not like it. It was said to him: Why? He said: There is nothing saheeh about it, and he waved his hand as if dismissing it. End quote.
2. al-Nawawi (may Allah have mercy on him) said in al-Majmoo‘ Sharh al-Muhadhdhab (3/547-548):
al-Qaadi Husayn, and the authors of al-Tahdheeb and al-Tatimmah said: Salaat al-Tasbeeh is mustahabb, because of the hadeeth narrated concerning it. But this view of it as mustahabb issubject to further discussion, because the hadeeth in question is da‘eef (weak), and it involves changing the regular format of the prayer, so it should not bedone without a hadeeth (to support it). Al-Tirmidhisaid: More than one hadeeth was narrated from the Prophet (blessings and peace of Allah be upon him) concerning Salaat al-Tasbeeh, but not many of them are saheeh. And al-‘Aqeeli said: There is noproven hadeeth about Salaat al-Tasbeeh. End quote.
3. Shaykh al-Islam Ibn Taymiyah (may Allah havemercy on him) said in Majmoo‘ al-Fataawa (11/579):
The best of the reports narrated about these prayers is the hadeeth about Salaat al-Tasbeeh, which was narrated by Abu Dawood and al-Tirmidhi, but nevertheless none of the four imams spoke of it; in fact, Ahmad regarded the hadeeth as da‘eef, and these prayers are not mustahabb.
4. Shaykh Ibn ‘Uthaymeen (may Allah have mercy on him) said in Majmoo‘ Fataawa Ibn ‘Uthaymeen (14/327):
What seems more likely to be correct in my opinion is that Salaat al-Tasbeeh is not sunnah, and that the hadeeth about it is da‘eef. This is for several reasons:
(i) The basic principle concerning acts of worship is that they aredisallowed unless there is proven evidence that theyare prescribed.
(ii) The hadeeth is mudtarib (weak); there is a difference of opinion concerning it for several reasons.
(iii) None of the imams regarded it as mustahabb.
(iv) If this prayer was prescribed, the ummah would have narrated a report concerning which there was no doubt and it would have been well known among them because of its great benefit. Moreover, it is notlike any other act of worship, because there is no act of worship in which so much choice is given that it may be doneonce every day, or once ina week, or once in a month, or once in a year, or once in a lifetime. Because the weak hadeeth states that it is ofgreat benefit and becauseit is not like any other act of worship, yet it is not well known and was not transmitted, we know that there is no basis for it, because if an act of worship is different from other acts of worship, andif it were of great benefit, people would pay attention to it and transmit it, and it would be popular and well known. Because that is not the case with regard to this prayer, we know that it is not prescribed. Hence none of the imams regarded it as mustahabb,as Shaykh al-Islam Ibn Taymiyah (may Allah havemercy on him) said. Among the naafil acts which are proven to be prescribed in Islam there is a great deal of goodness and barakah forthe one who wants more, so he should be content with that which is proven,
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