Riyad as-Salihin 548
Abu Hurairah (May Allah be pleased with him) reported:
Messenger of Allah (ﷺ) said, "Allah, the Exalted, says, 'Spend, O son of Adam, you will also be spent upon." [Al-Bukhari and Muslim] .
وعنه أن رسول الله صلى الله عليه وسلم  قال‏:‏ “قال الله تعالى‏:‏ انفق يا ابن آدم ينفق عليك” ‏(‏‏(‏متفق عليه‏)‏‏)‏‏.‏