Do not covet anything avariciously; for if you ignore it, it will come to you anyway, if it is destined to be yours. Then you would find ease in your heart with Allah swt, praise for leaving it.
But you will be blamed for your haste in (instead) seeking it, for not trusting Him, and for not being content with the decree. Allah swt created this world the same as a shadow: when you chase it, it tires you out and you can never catch up with it. If you leave it alone, it follows you inexorably, and gives you not cause for fatigue.
Imam Sadiq (as), Lantern of the Path