It is not authentic.

There is a hadith narated by al imam ahmed in al musnad and by abu dawood, saying When you pray Fajr, then say before speaking to any of the people, ‘Allahumma ajirni min al-nar (O Allah, protect me from the Fire)’ seven times, and 7 times at maghrib . Is this an Authentic hadith ?

Commentary on Hadeeth | September 4, 2015 2:39 am
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is it true that the water of Kausar on the Day of Judgement will be a river? And Prophet Mohammed (peace be upon him) will give it by his hands, and their will be as much cups as the number of stars in the sky for the Muslim ummah only.
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i have heard that reciting Surah Al Mulk everynight , will protect from the punishment of the grave. Is this authentic ? Is the hadith below authentic? “One of the companions of the Prophet (ﷺ) pitched a tent on a grave without knowing that it was a grave. Suddenly he heard a person from the grave reciting Surah al-Mulk till he completed it. So he went to the Prophet (ﷺ) and said: ‘Oh Messenger of Allah, I pitched my tent on a grave without realizing that is was a grave. Then suddenly I heard a person from the grave reciting Surah al-Mulk till he completed it.’ The Messenger of Allah (ﷺ) said: ‘It is the defender, it is the deliverer- it delivers from the punishment of the grave.'”