Turn you at my reproof: behold, I will pour out my spirit unto you, I will make known my words unto you.
Turn you at my reproof - to the God from whom ye have turned away.
Behold, I will pour out, [like a gushing, bubbling stream, abundant, continuous, and clear ( 'abiy`aah (H5042))]
My Spirit unto you - I will turn the floods of the Spirit toward you, giving you the power, if ye will avail yourselves of it, to be converted, and leaving you without excuse if ye will not. Here the Gospel outpouring of the Spirit is alluded to (John 7:38-39; John 4:14; Zechariah 12:10; Isaiah 44:3). However, as the parallel "my words" implies, it is the Spirit-inspired message and offer of grace abundant that is meant, rather than the inward working of the Spirit on the hearer's heart.
I will make known my words unto you - "I will make known" by "my Spirit" my "words" of divine "wisdom and knowledge" (1 Corinthians 12:8; Matthew 11:27).