Narrated Umar ibn al-Khattab(R.A.):
Umar(R.A.) heard the Prophet(PBUH) say:"If you put your faith completely in Allâh, He will arrange for your sustences in the same way as He provides for the birds. They go out in the morning with their stomachs empty and return filled in the evening"
[Transmited by Thirmidhi]
