Ibn Abbas said “I’ll never be able to repay four people: A person who said salaam before me, a person who made space for me in a gathering, a person whose feet got dusty walking around to do something for me, and the fourth can’t be repaid except by Allah.” He was asked, “Who is that?” He said “A person who spent the night thinking about who to approach for help with a problem, thought me worthy and approached me.”
Shu’ab al-Iman, al-Bayhaqi