IIRC in Buddhism not lying is emphasised as one aspect of 'right speech', other requirements being those such as non-divisiveness, etc. https://www.accesstoinsight.org/ptf/dhamma/sacca/sacca4/samm... There is also a record of Buddha discussing the value of ideas based upon personal experience rather than blindly accepting them from others. https://www.dhammatalks.org/suttas/AN/AN3_66.html

Modern Chinese uses "tingshuo" 聽說 (听说) https://en.wiktionary.org/wiki/%E8%81%BD%E8%AA%AA

Internet uses IIRC? ;)

Or also: “Thus have I heard”. https://en.m.wikipedia.org/wiki/Thus_have_I_heard