Psalm 68:9
"Thou, O God, didst send a plentiful rain, whereby thou didst confirm thine inheritance, when it was weary."
Cross References (ranked by relevance)
Deuteronomy 11:14
That I will give you the rain of your land in his due season, the first rain and the latter rain, that thou mayest gather in thy corn, and thy wine, and thine oil.
Ezekiel 34:26
And I will make them and the places round about my hill a blessing; and I will cause the shower to come down in his season; there shall be showers of blessing.