at that time appeared bright through ṣrībhāshyam etc., then —

at the time when emperumānār had incarnated. —

they were fully engaged in birth and death repeatedly; —

daśśling like lightning —

shiningly manifesting —

rising —

appear/incarnate —

appear —

manifesting —

incarnating with the intent to engage in creation (as said in -prārthurāsīththamŏnutha:-) —

 came and incarnated —

 appeared —

 being the one who incarnated —

you appeared in front of that elephant —

appeared —

was ī born? —

was ī born? —

presented his form —

one who appeared —

came and born; —