as for the rain
Psalm 72:6
He shall come down like rain upon the mown grass: as showers that water the earth.
the latter rain
Hosea 6:3
Then shall we know, if we follow on to know the LORD: his going forth is prepared as the morning; and he shall come unto us as the rain, as the latter and former rain unto the earth.
Zechariah 10:1
Ask ye of the LORD rain in the time of the latter rain; so the LORD shall make bright clouds, and give them showers of rain, to every one grass in the field.