A hadeeth for which there is no basis warning those who do not offer the five daily prayers

This hadeeth does not appear in any of the books of Sunnah,
or any books of saheeh (sound) hadeeth or even books of da‘eef (weak)
hadeeths. This indicates that it has no basis and no isnaad. Rather some
people have fabricated it and spread it in chat rooms and on some websites,
thinking that they can scare some people and stop them giving up prayer.
They do not know that they have committed a great sin by doing this. Some
scholars even stated that the one who tells a lie about the Prophet
(blessings and peace of Allah be upon him) deliberately is a kaafir. 

Al-Ameer as-San‘aani (may Allah have mercy on him) said: 

The majority are of the view that telling a lie deliberately
about Allah and His Messenger (blessings and peace of Allah be upon him) is
a major sin, because the definition of a major sin is applicable in this
case, as the Prophet (blessings and peace of Allah be upon him) mentioned
one who tells a lie about him deliberately, and this case comes under the
category mentioned in the hadeeth of being deserving of punishment. 

al-Juwayni said:  

It – i.e. this major sin – constitutes kufr. This is
indicated by the verse in which Allah, may He be exalted, says
(interpretation of the meaning): 

“So who does more wrong than he who forges a lie against
Allah or denies His Ayat (proofs, evidences, verses, lessons, signs,
revelations, etc.)? Surely, the Mujrimoon (criminals, sinners, disbelievers
and polytheists) will never be successful!”

[Yoonus 10:17].  

This verse describes telling a lie about Allah and denying
His signs as being equal, and there is no doubt that denying His signs
constitutes kufr. And telling a lie about the Messenger (blessings and peace
of Allah be upon him) is like telling a lie about Allah, may He be exalted.
From this verse, in which Allah denounces this action, we understand that it
is a sin and that there is no sin or wrongdoing greater than that. Al-Juawyni
said: and because the one who fabricates a lie about Allah or His Messenger
may do so in order to waive a well established ruling, and waiving a well
established ruling constitutes kufr, because it is rejecting what the
Lawgiver has ordained, which constitutes kufr. Moreover, fabricating lies
about sharee‘ah (and its rulings) is inevitably indicative of a lack of
respect for it. And Allah knows best.

End quote from Tawdeeh al-Afkaar, 2/88 

The Standing Committee was asked about this hadeeth and
others, and they responded as follows: 

These hadeeths cannot be attributed to any of the books of
Sunnah, and after researching the matter, we do not know of any basis for
them. So what must be done is prevention of their distribution and
publishing.

End quote from Fataawa al-Lajnah ad-Daa’imah (vol. 2,
3/259) 

Shaykh Saalih al-Fawzaan (may Allah preserve him) was asked
about this hadeeth and he said: 

This has no basis as far as I know and there is a strong
warning in the Qur’aan and the saheeh Sunnah concerning the one who forsakes
prayer, which is sufficient. For example, the Prophet (blessings and peace
of Allah be upon him) said: “What stands between a person and kufr is giving
up prayer” (narrated by Muslim). And the Prophet (blessings and peace of
Allah be upon him) said: “The covenant that stands between us and them is
the prayer; whoever gives it up has becomes a kaafir.” Classed as saheeh by
al-Albaani in Saheeh at-Targheeb wa’t-Tarheeb, 564.

And Allah says concerning the sinners: “ ‘What has caused
you to enter Hell?’ 43. They will say: ‘We were not of
those who used to offer their Salat (prayers)’” [al-Muddathhir 74:42-43].
The primary reason for which they were admitted to Hell is that they failed
to offer the prayer; abandoning the prayer constitutes kufr – Allah forbid –
and puts a person beyond the pale of Islam, whether he neglects it because
he denies that it is obligatory, or he neglects it even though he
acknowledges that it is obligatory, except in the case of one who forgets to
pray or falls asleep. 

With regard to the message quoted by the questioner, I do not
know of any basis for it or for what is distributed in some publications,
“Whoever neglects the prayer will be punished with fifteen punishments.”
There is no basis for this.

End quote from Noor ‘ala ad-Darb, 20 Muharram 1427 AH
(0.17-0.19 on the tape) 

So it is not permissible to publish this hadeeth or to
attribute it to the Prophet (blessings and peace of Allah be upon him);
rather what must be done is warning people about it and explaining that it
has no basis in the books of Ahl as-Sunnah. 

Whoever would like to see saheeh hadeeths that warn against
abandoning or neglecting the prayer should read the book Saheeh at-Targheeb
wa’t-Tarheeb by Shaykh al-Albaani, 1/136-140 

And Allah knows best.