1QHa, column 10, lines 16-19: 16 [All] men of deceit mutter against me like the sound of the din of turbulent waters; devilish schemes are [all] 17 their thoughts. They throw into the grave the life of the man in the mouth of whom you have established and imparted understanding. 18 You placed in his heart to open the source of knowledge for all those who understand. But they have changed them for an uncircumcised lip 19 and a strange tongue [ולשון אחרת], that of a people without understanding, and so they will be ruined by their mistake. ~
1QHa, column 12, lines 12b-18a: 12b But you, O God, abhor every plan of 13 Belial and your counsel remains, and the plan of your heart persists endlessly. But they, hypocrites, plot intrigues of Belial, 14 they search you with a double heart, and are not firmly based in your truth. A root which produces poison and bitterness is in their thoughts, 15 with stubbornness of heart they inquire, they search for you among the idols, place in front of themselves the stumbling-block of their iniquities, they go 16 to search for you in the mouth of prophets of fraud attracted by delusion. They speak to your people [with] stut[ter]ing lip and strange tongue [ולשון אחרת] 17 to convert to folly all their deeds with deceit. For they have not chosen the path of your [heart] nor have they listened to your word. For they said 18a of the vision of knowledge, “It is not certain,” and of the path of your heart, “It is not that.”
1QHa, column 15, line 10: 10 And you, my God, you have placed me for the downtrodden of the holy council; you have [...] in your covenant, and my tongue is like your disciples [ולשוני כלמודיך].
CD-A, column 5, lines 11b-13a: 11b And also they defile their holy spirit, for with 12 blasphemous tongue [ובלשון גדופים] they have opened their mouth against the statutes of God’s covenant, saying, “They are unfounded.” They speak abomination 13a against them.
These examples come from the sectarian texts, not from a shared Judaic heritage.
Ben.