Hazrat Mufti Mahmood Hasan Gangohi (rahmatullahi ‘alaih) mentioned:

Generally, people have this concern that if they spend a great sum of money, how will they recover it? When we are contented and have placed our reliance on the King of kings, the One Who possesses the treasures to everything, (as He has mentioned): “Most certainly the treasures of everything is by Us,” this is the highest form of confidence.

The reason is that a miserly person is always plagued by irrational thoughts. “If I am to give my wealth to another person, I will have nothing left. This is my requirement. If I am in need, where will I get it? Even if I pursue a business venture, will I be able to acquire it or not? Will I be successful or not?”

All these absurd thoughts trouble the mind. However, if this person were to place his total reliance on Allah Ta‘ala, He being the One Who had initially given it to him and He will give it to him again, then to part with this wealth will not be a problem. An individual will be at great ease irrespective of whether he has the wealth or not. He will tell himself, “If it is not in my possession, it is certainly in Allah Ta‘ala’s treasure. And He has promised to give it to me. If He is the giver, why should I be overcome with anxiety?” (Discourses of Faqeeh-ul-Ummah Hazrat Mufti Mahmood Hasan Gangohi, vol. 1, pg. 18)