God says
As for anyone, be it man or woman – who does righteous deeds, and is a believer withal – him shall We most certainly cause to lead a good life;* and most certainly shall We grant unto such as these their reward according with their best that they ever did. – Q.16:97
* This may relate either to life in this world -- inasmuch as a true believers invariably find happiness in the God-consciousness – or to the happiness which awaits them in the hereafter, or to both.
…. so establish regular prayers, render purifying dues (zakah), and hold fast to God! He is your protector – the best to protect, the best to help! – Q. 23:78
And how many a living creature is there that takes no thought of its own sustenance,* [the while] God provides for it as [He provides] for you – since He alone is all-knowing, all seeing. -- Q.29:60
*I.e., is either too week to fend for itself or (according to Al-Hasan, as quoted by Zamakhshari) does not store up provisions for the marrow.
Prophet said
“If you had relied on God with due reliance, He would have certainly given you provision as He provides to birds who get up hungry in the morning and return with a belly-full at dusk.”-- H: Tirmizi and Ibn Majah. N: Omar-b-al Khattab.
