The affix laṭ (Present Tense) comes after a verb when the particle sma is in connection with it (and denotes a past time not belonging to the current day and unperceived by the speaker). Note This debars liṭ (Perfect Tense) .,
All the words within brackets are understood in this aphorism. This debars लिट् or the perfect tense. Thus यजति स्म युधिष्ठिरः 'Yudhishthira sacrificed'; so also नलेन स्म पुराधीयते । उर्णया स्म पराधीयते ॥,