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.”
Jami` at-Tirmidhi Book 48, Hadith 175
"My father told me: I witnessed the funeral of 'Abdur-Rahamn bin Samurah. Ziyad came out, walking in front of the bier, and some men from the family of 'Abdur-Rahman and their freed slaves came out, facing the bier and walking backward, saying: 'Slow down, slow down, may Allah bless you.' And they were walking slowly. Then when they were partway to Al-Mrbad, Abu Bakrah joined us on his mule. When he saw what they were doing, he rushed to them on his mule, brandishing his whip, and said: 'Move on, for by the One Who honored the face of Abu Al-Qasim, I remember when we were with the Messenger of Allah, we were walking fast, so the people speeded up."'
Sunan an-Nasa'i Book 21, Hadith 95