Qur'an, Al-An'am, Surah 6:99
It is God who sends rain from the sky, bringing forth buds and green leaves on every plant. The rain causes the grain to swell, the palm trees to yield clusters of dates, the vines to yield grapes, and the olive trees to bear olives; it brings forth all manner of pomegranates. Look at the fruit as it ripens! Surely this is a sign for true believers.