Jami` at-Tirmidhi Book 48, Hadith 176
“May the man before whom I am mentioned - and he does not send Salat upon me - be humiliated. And may a man upon whom Ramadan enters and then passes, before he is forgiven, be humiliated. And may a man whose parents reached old age in his presence, and they were not a cause for his entrance to Paradise, be humiliated.”
The Prophet (ﷺ) entered the Masjid and there was a man who had performed Salat and was supplicating. He was saying in his supplication: “O Allah, none has the right to be worshipped but Allah, You are the One Who gives blessings, Originator of the heavens and the earth, Possessor of glory and generosity (Allāhumma lā ilāha illā ant, al-Mannān, Badī`us-samāwāti wal-arḍ, Dhal-Jalāli wal Ikrām).” So the Prophet (ﷺ) said: “Do you know what he has supplicated Allah with? He has supplicated to Allah by His Greatest Name, the one which if He Is called upon by it, He responds, and when He is asked by it, He gives.”
“The stingy person is the one before whom I am mentioned, and he does not send Salat upon me.”