Warning against the book Dalaa’il al-Khayraat
Question

                Is it permissible to practice salawat to prophet(s.a.w) that stated in the ketab Dalailul Khairat.Is it true every salawat that stated in that ketab have their own specialty.
Praise be to Allah.It is not permissible to rely on the book 
    Dalaa’il al-Khayraat wa Shawaariq al-Anwaar fi Dhikr al-Salaah ‘ala al-Nabiy al-Mukhtaar, because it is full of things that go against Islamic 
    teachings, and of phrases that represent shirk, and da’eef (weak) and mawdoo’ (fabricated) hadeeths. We will discuss this in more detail in sha 
    Allah. 
The Muslim should beware of attributing words to the Prophet  (peace and blessings of 
    Allaah be upon him) without knowing how sound they are, because telling lies about him is not like telling lies about anyone else. 
The Prophet  (peace and blessings of 
    Allaah be upon him) said: “Whoever tells lies about me, let him take his place in Hell.” Narrated by al-Bukhaari, 107; Muslim, 3. And he said: “Do 
    not tell lies about me, for whoever tells lies about me, will enter Hell.” Narrated by al-Bukhaari, 106). 
And he said: “Whoever narrated a hadeeth from 
    me knowing that it is false, then he is one of the liars.” (Narrated by Muslim, 1). 
The best way of sending blessings upon the 
    Prophet  (peace and blessings of Allaah be upon him) is that which he taught to his companions: 
Al-Bukhaari (6357) and Muslim (406) narrated 
    that ‘Abd al-Rahmaan ibn Abi Layla said: Ka’b ibn ‘Ujrah met me and said to me, Shall I not give you a gift? The Prophet  (peace and blessings 
    of Allaah be upon him) came out to us and we said, “O Messenger of Allaah, we know how to send salaams upon you, but how should we send blessings 
    upon you?” He said, “Say: Allaahumma salli ‘ala Muhammad wa ‘ala aali Muhammad kama salayta ‘ala aali Ibraaheem, innaka hameedun majeed; 
    Allaahumma baarik ‘ala Muhammad wa ‘ala aali Muhammad kama baarakta ‘ala aali Ibraaheem, innaka hameedun majeed (O Allaah, send prayers upon 
    Muhammad and upon the family of Muhammad, as You sent prayers upon the family of Ibraaheem, verily You are Worthy of Praise, Full of Glory. O 
    Allaah, send blessings upon Muhammad and upon the family of Muhammad, as You sent blessings upon the family of Ibraaheem, verily You are Worthy of 
    Praise, Full of Glory). 
Al-Bukhaari (3369) and Muslim (6360) narrated 
    from Abu Humayd al-Saa’idi (may Allaah be pleased with him) that they said: “O Messenger of Allaah, how should we send blessings upon you?” The 
    Messenger of Allaah  (peace and blessings of Allaah be upon him) said: “Say Allaahumma salli ‘ala Muhammadin wa azwaajihi wa dhurriyyatihi 
    kama salayta ‘ala aali Ibraaheem, wa baarik ‘ala Muhammadin wa azwaajihi wa dhurriyyatihi kama baarakta ‘ala aali Ibraaheem, innaka hameedun 
    majeed (O Allaah, send prayers upon Muhammad and his wives and progeny as You sent prayers upon the family of Ibraaheem, and send blessings 
    upon Muhammad and his wives and progeny as You sent blessings upon the family of Ibraaheem, verily You are Worthy of Praise, Full of Glory). 
Al-Suyooti (may Allaah have mercy on him) 
    said: I read in al-Tabaqaat by al-Taaj al-Subki, quoting from his father, the words: “The best words with which a person can send blessings 
    upon the Prophet  (peace and blessings of Allaah be upon him) are the words that appear in the Tashahhud. 
He said: Whoever says these words has sent 
    blessings upon the Prophet  (peace and blessings of Allaah be upon him) for certain, and whoever says any other words, there is some doubt as 
    to whether he has sent blessings in the required manner, because they said, ‘How should we send blessings upon you?’ and he said, ‘Say…’ So he 
    stated that sending blessings upon him is done in that manner. 
He said: When I was young, when I sent 
    blessings upon the Prophet  (peace and blessings of Allaah be upon him) I used to say, ‘Allaahumma salli wa baarik wa sallam ‘ala Muhammad 
    wa ‘ala aali Muhammad, kama salayta wa baarakta wa salamta ‘ala Ibraaheem was ‘ala aali Ibraaheem, innaka hameedun majeed (O Allaah, send 
    prayers and blessings and peace upon Muhammad and upon the family of Muhammad, as You sent prayers and blessings and peace upon Ibraaheem and the 
    family of Ibraaheem), but then it was said to me in a dream, Are you more eloquent or concise or more knowledgeable about the meanings of words 
    than the Prophet  (peace and blessings of Allaah be upon him)? If there had been any more eloquent words, the Prophet  (peace and 
    blessings of Allaah be upon him) would not have chosen these words. So I sought forgiveness for that and went back to the words of the Prophet 
     (peace and blessings of Allaah be upon him). 
And he said: If anyone swears to send the best of prayers upon the Prophet  (peace and 
    blessings of Allaah be upon him), then these words are the best he can say. 
Quoted from al-Sunan wa’l-Mubtada’aat 
    by Muhammad ‘Abd al-Salaam al-Shuqayri, p. 232 
And Allaah knows best.