Rashi on Numbers 14:34/רש"י על במדבר י״ד:ל״ד

1את תנואתי [AND YE SHALL KNOW] את תנואתי — You shall know (realise) that you have removed your heart from following after Me. תנואה is an expression for “removing”, similar to (Numbers 30:6) “for her father hath removed her (הניא) from her vow” (cf. Rashi on that verse, where he quotes this phrase).