Haggai 1:10-11

The hot weather and poor harvests that the returned exiles were enduring were due to their selfish behavior (cf. Leviticus 26:19-20; Deuteronomy 28:22-24). Dew was the only form of moisture that plants enjoyed during the hot summer months, beside artificial irrigation, but even that was unavailable. The Lord had decreed drought that affected all their essential products and all aspects of their lives (cf. Deuteronomy 28:38).

"Those who plan to give to God ’once they have enough for themselves’ will never have enough for themselves!" [Note: Dyer, p. 816.]