al-Sharif al-Radi (d. 406 AH) · Thaqalayn library edition, reproduced verbatim
فسئل (عليه السلام) عن معنى قوله هذا، فجمع أصابعه ووضعها بين أذنه وعينه ثمّ قال: الْبَاطِلُ أَنْ تَقُولَ سَمِعْتُ، وَالْحَقُّ أَنْ تَقُولَ رَأَيْتُ!
Amīr al-mu’minīn was asked the meaning of this whereupon he closed his fingers together and put them between his ear and eye and said: It is falsehood when you say, “I have heard so,” while it is truth when you say, “I have seen.”
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