"He sends down the angels, with the inspiration of His command, upon whom He wills of His servants, (telling them), "Warn that there is no deity except Me; so fear Me." [16:2]
"For to God belong the forces of heaven and the earth; and God is Exalted in power, full of wisdom." - [48:7]
Sahih Bukhari; Hadith no: 53; Narrated / Authority of: Abu Masud; The Prophet said, "If a man spends on his family (with the intention of having a reward from Allah) sincerely for Allah's sake then it is a (kind of) alms-giving in reward for him."