Matthew Poole and continuators on Proverbs 5:15

15. Drink Waters out of thine own cistern; and running waters out of thine own well .

This Metaphor contained here, and v. 16, 17, 18. is to be understood, either 1. of the free and lawful use of a mans estate, both for his own comfort, and for the good of others. Or rather 2. of the honest use of Matrimony, as the proper Remedy against these filthy practices. This best suits with the whole context both foregoing and following: and thus it is explained in the end of v. 18. So the sense is, Content thy self with those delights which God alloweth thee, with the sober use of the Marriage-Bed. Why shouldst thou ramble hither and thither, trespassing against God and men, to steal their Waters which thou mightst freely take out of thine own Cistern or Well. The ground of the Metaphor is this, that waters were scarce and precious in those Countries, and therefore men used to make Cisterns & Wells for their own private use. And the same Metaphor of Waters, and of a Pit, or Well is applied to things of this nature elsewhere, as Prov. 23. 27. Isa. 48. 1. & 51. 1.