After tad ending in the Locative -7th case when time is denoted, comes the affixes dā and dānīm ,
The दानीम् is read into the sutra by force of the word च 'also'. Thus तस्मिन् काले = तदा or तदानीम् 'at that time'. This sutra, so far as it ordains दा after the word तद् is useless, because the word तद् already takes दा by 5.3.15.,