Do they not see that Allah extends provision for whom He wills and restricts [it]? Indeed, in that are signs for a people who believe.
It was narrated from Jabir bin 'Abdullah that the Messenger of Allah (sallallaahu alayhi wa sallam) said:
"O people, fear Allah and be moderate in seeking a living, for no soul will die until it has received all its provision, even if it is slow in coming. So fear Allah and be moderate in seeking provision; take that which is permissible and leave that which is forbidden. "
[Sunan Ibn Maajah]