Commentaries:
Jamieson, Fausset, and Brown
ye . . . thy . . . this people—He turns away from addressing the people to the prophet; implying that He puts them to a distance from Him, and only communicates with them through His prophet (Jeremiah 5:19). 
 fire . . . wood—Thy denunciations of judgments shall be fulfilled and shall consume them as fire does wood. In Jeremiah 23:29 it is the penetrating energy of fire which is the point of comparison.
Other Jamieson, Fausset, and Brown entries containing Jeremiah 5:14:
Jeremiah 3:6
Revelation 11:5
 
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