The Prophet (ﷺ) said: Those who do not show mercy to our young ones and do not realise the right of our elders are not from us.
Sunan Abi Dawud Book 43, Hadith 171
← Previous Hadith I heard AbulQasim (ﷺ) who spoke the truth and whose word was verified say: Mercy is taken away only from him who is miserable.

Sunan Abi Dawud Book 43, Hadith 170 Next Hadith → To Allah, his book, his Apostle, the leaders (public authorities) of the believers and all the believers, and the leaders (public authorities) of Muslim and the Muslims and the Muslims in general.

Sunan Abi Dawud Book 43, Hadith 172