Jeremiah 6:9
8 So take warning, Jerusalem, or I will abandon you in disgust and make you desolate, a place where no one can live.” 9 This is what the Lord of Heaven’s Armies said to me: “Those who remain in Israel will be like the grapes thoroughly gleaned from a vine. So go over them again, as though you were a grape harvester passing your hand over the branches one last time.” 10 I answered, “Who would listen if I spoke to them and warned them? Their ears are so closed that they cannot hear! Indeed, the Lord’s message is offensive to them. They do not like it at all.
Luke 6:44
42 How can you say to your brother, ‘Brother, let me remove the speck from your eye,’ while you yourself don’t see the beam in your own? You hypocrite! First remove the beam from your own eye, and then you can see clearly to remove the speck from your brother’s eye. 43 “For no good tree bears bad fruit, nor again does a bad tree bear good fruit, 44 for each tree is known by its own fruit. For figs are not gathered from thorns, nor are grapes picked from brambles. 45 The good person out of the good treasury of his heart produces good, and the evil person out of his evil treasury produces evil, for his mouth speaks from what fills his heart.
Notes and References
"... The Sermon on the Mount’s warning against ‘false prophets’ reverberates in 2 Peter 2:1 (now as in ancient times there are both true and false prophets), in 1 John 4:1 and Didache 11:5–10 (many false prophets have gone out into the world, and they need to be judged by their conduct), and in Revelation 16:13; 19:20; 20:10 (the beast and the false prophet are cast into a lake of burning sulfur), but the idea of false prophets is not original with the Sermon on the Mount: “the concept itself goes back to the Hebrew Bible.” The book of Jeremiah saliently mentions ψευδοπροφῆται (‘false prophets’) nine times. Jeremiah 6 contains a judgment prophecy of the time when the Lord, ‘like a grape-gatherer’ (The word used by Jeremiah is ‘ὁ τρυγῶν’ (‘the grape-gatherer’)). Although Matthew 7:16 uses ‘συλλέγουσιν’ (‘they gather’) to cover the gathering of both grapes and figs, the parallel text in Luke 6:44 uses ‘συλλέγουσιν’ (‘they gather’) for the figs and ‘τρυγῶσιν’ (‘they gather grapes’) for the grapes, thus echoing Jeremiah 6:9 even more closely) will glean the remnant of Israel as if it were a vine; Jeremiah singles out for condemnation ‘the priests and false prophets,’ and he admonishes the people to seek and ‘ask for the ancient paths, where the good way is (ἡ ὁδὸς ἡ ἀγαθή) and walk in it’ (6:9; 13, 16) ..."
Welch, John W. The Sermon on the Mount in the Light of the Temple (p. 175) Ashgate, 2009