Sadaqah purifies wealth, wipes away sins, and is multiplied in reward. Giving never truly reduces what you have:
"Charity does not diminish wealth."Prophet Muhammad ﷺ, narrated by Abu Hurayrah — Sahih Muslim 2588
"The example of those who spend their wealth in the way of Allah is like a seed [of grain] which grows seven spikes; in each spike is a hundred grains. And Allah multiplies [His reward] for whom He wills."Quran 2:261 (Saheeh International)
"Fasting is a shield, and charity extinguishes sin as water extinguishes fire."Prophet Muhammad ﷺ, narrated by Mu'adh ibn Jabal — Jami' at-Tirmidhi 2626 (hasan)
"The upper hand is better than the lower hand; the upper hand is the giving hand, and the lower hand is the begging hand."Prophet Muhammad ﷺ, narrated by 'Abdullah ibn 'Umar — Sahih al-Bukhari 1429 (agreed upon)