The Hebrew verb zuv (זוּב) means to flow, gush forth, or discharge. It is used of flowing water, blood, and bodily discharges. Most notably it appears in eretz zavat chalav u-devash — a land flowing with milk and honey — describing the Promised Land of abundance.
The flowing Promised Land connects zuv to God's covenant faithfulness. Flowing is a metaphor for the overflow of divine blessing. This reaches its New Testament fulfillment in Jesus' promise of rivers of living water flowing from the believer's heart (John 7:38), and the river of life flowing from God's throne (Revelation 22:1).