'Foretaste' in the Bible

And not only this, but we too, who have the first fruits of the Spirit [a joyful indication of the blessings to come], even we groan inwardly, as we wait eagerly for [the sign of] our adoption as sons—the redemption and transformation of our body [at the resurrection].

The Spirit is the guarantee [the first installment, the pledge, a foretaste] of our inheritance until the redemption of God’s own [purchased] possession [His believers], to the praise of His glory.