1 Cor 15:3-4

παρέδωκα γὰρ ὑμῖν ἐν πρώτοις, ὃ καὶ παρέλαβον, ὅτι Χριστὸς ἀπέθανεν ὑπὲρ τῶν ἁμαρτιῶν ἡμῶν κατὰ τὰς γραφὰς 4 καὶ ὅτι ἐτάφη καὶ ὅτι ἐγήγερται τῇ ἡμέρᾳ τῇ τρίτῃ κατὰ τὰς γραφὰς

For I delivered to you all in the first place (foremost, of first importance) what I also received, that Christ died for our sins according to the scriptures and that he was buried and that he rose on the third day according to the scriptures


 * note the construction of "the third day" - τῇ ἡμέρᾳ τῇ τρίτῃ (the day the third)κατά
 * κατὰ τὰς γραφὰς - according to the scriptures. γραφὰς is plural accusative. κατὰ + accusative => according to. See κατά for more.
 * Significance of choice of tenses:
 * ἀπέθανεν (died) aorist active indicative 3sg, and ἐτάφη (was buried) aorist passive indicative 3sg. Aorist is appropriate because these are done deals, we can look at these with perfective aspect, as events as a whole
 * ἐγήγερται (has been raised) perfect passive indicative 3sg). The perfect tense is appropriate as it refers to a past completed event that has ongoing consequences or implications, or that it continues on.