《幼学琼林·卷四·文事》
赞扬别人进步神速，就说 士别三日，当刮目相看 ；称赞别人学业精通，就说 面壁九年，始有此神悟 。
称人近来进德，曰士别三日，当刮目相看；羡人学业精通，曰面壁九年，始有此神悟。
To praise someone's rapid progress, it is said that "when a scholar is separated for three days, he should be looked at with admiration"; To praise someone for being proficient in his studies, it is said that "facing the wall for nine years, I have this divine realization".