One of the benefits of giving is that it increases one’s wealth

The Messenger of Allāh (may Allāh praise him and Peace be upon him) said, “I swear by Allāh regarding three things: A slave’s wealth will not decrease due to giving Ṣadaqah (optional charity); Whenever a slave patiently endures and act of oppression, Allāh gives increases his honour; whenever a slave opens a door to begging, Allāh opens a door to poverty for him.” [Narrated by Ibn Mājah]

Translation: Abu Zakariyya Dawood Kinloch