Verse from Al'Quran
Do they not observe the birds above them, spreading their wings and folding them in? None can uphold them except (Allah) Most Gracious: Truly (Allah) Most Gracious: Truly it is He that watches over all things.
The Qur’an 67/19
Verse from Hadith
Three prayers will be accepted certainly: Opressed one’s prayer, guest’s prayer and prayer of father for his child.
Ibn Mâjah, Duâ, 11.