瑜伽論記 11.233

11.233

自下第十五解四烏拕南，若作嗢字皆須改正，舊語不正，名四優陀那，翻名為印，今翻名說，即世尊常誦說，此義似無問自說，隨義傍翻亦得名印，或名總略義或名標相。如說無常是有為標相，苦是有漏法標相，無我是一切法標相，涅槃寂靜是無為法標相。若名嗢拕南則名集施，即名烏拕南故是標相。

From here below, the fifteenth section explains the four udānas. If written with the character *wen* (嗢), they must all be corrected. The old terminology was imprecise, calling them the four *youdana* (優陀那), translated as 'seals' (mudrā); now it is translated as 'sayings' (udāna), namely what the World-Honoured One constantly recites and speaks. This meaning resembles an unprompted utterance (udāna). In loose translation following its meaning, it may also be called 'seal', or called 'summarized meaning', or called 'indicative sign'. For example, it is said that impermanence is the indicative sign of conditioned phenomena, suffering is the indicative sign of tainted phenomena, non-self is the indicative sign of all phenomena, and the tranquility of nirvāṇa is the indicative sign of unconditioned phenomena. If called *udāna* (嗢拕南), it means a collected verse (saṃgraha-gāthā); because it is here named *udāna* (烏拕南), it is an indicative sign.