Not when you read it in the Greek....he didn't!
[I Corinthians 16:2] Κατὰ down/according to/as per (+acc), against (+gen) μίαν one (acc) { σαββάτων sabbaths (gen) ♦ σαββάτου sabbath (gen) } ἕκαστος each (of two) (nom) ὑμῶν you(pl) (gen) παρ’ beside (+acc,+gen,+dat) ἑαυτῷ him-/her-/itself (dat) τιθέτω let-him/her/it-be-PLACE-ing! , θησαυρίζων while TREASURE UP-ing (nom) ὅ τι who-/whom-/whichever (nom|acc) { ἂν ever ♦ ἐὰν if-ever } εὐοδῶται he/she/it-should-be-being-PROSPER-ed , ἵνα so that / in order to /because μή not , ὅταν whenever ἔλθω I-should-COME , τότε then { λογίαι collections (nom|voc); eloquent ([Adj] nom|voc) ♦ λογεῖαι collections (nom|voc) } γίνωνται they-should-be-being-BECOME/HAPPEN-ed .
Same example as I gave in post #49. Paul is speaking of the First Sabbath between Passover and Pentecost. He expected to stay in Ephesus until Pentecost (verse 8) so you can see the timeline.
μίαν σαββάτων does not mean "First day of the week"....no matter how much you wish to twist it. It means "First of the Sabbaths" and there were seven of them between Passover and Pentecost [Leviticus 23:15-16]. Paul speaks of the first one.
On the First of the Sabbaths, or SUNDAY.
When the Jews reckoned the days of the week they always used the day in it’s relationship to the Sabbath.
Sunday was the first of the Sabbaths.
Monday was the second of the Sabbaths.
ect.
For example, one of the Pharisees said he “fasted twice in the Sabbaths”, a reference to their twice in a week fast.
And on the road to Emus, one of the men traveling with a disguised JESUS said, concerning the events of the past days, “Today is the third day”.
Sunday= first of the Sabbaths.
Monday = second of the Sabbaths.
Tuesday= third day of the Sabbaths.
Wednesday= forth day of the Sabbaths.
Thursday= fifth day o the Sabbaths.
Friday = sixth day of the Sabbaths.
Saturday= SABBATH.
They did not have names for the days of the weeks but used the term 1st, 2nd, 3rd of the Sabbaths.
So, when you see the term first of the Sabbaths it means first day of the week.
Check any lexicon or Greek translation.