Open unashamed making your word, the Word of God : HERE ....
First off...
2 Timothy 2:24 And the servant of the Lord must not strive; but be gentle unto all men, apt to teach, patient, 25 In meekness instructing those that oppose themselves; if God peradventure will give them repentance to the acknowledging of the truth; 26 And that they may recover themselves out of the snare of the devil, who are taken captive by him at his will.
If you can't stick to the issues without belittling, then you need a break and pray, because you ought to know if God is peradventuring, He doesn't need you to belittle. In fact, I have not read of any one winning any one over in that way in any conversation.
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<<...collected during church service on the first day of the week...>> Big Mouth Little Horn pipsqueak exegete!
16:1 further is one point "concerning the collection" on the list of Paul's announcements from and including 15:58, —
announcements which Paul made from the pulpit ON THE SABBATH as he preached to the Church wherever whenever, —
announcements he made after his Sabbath's SERMON as here, —
in 1Crinthians 15, and closed with verses 55-57, his sermon, —
which he then, LATER ON, WROTE to the Corinthian Church, —
in which Letter Paul inter alia "gave instruction about / concerning the collection", —
this Letter which Paul at any time after, during his preaching ministry, as and like an ordinary Epistle, WROTE to the Church in Corinth, —
which Letter had also to be read to all the churches during sermon-time (after ‘Service hour’), —
on the Sabbath (before “every First Day of the week”).
1 Corinthians 15:55 O death, where is thy sting? O grave, where is thy victory? 56 The sting of death is sin; and the strength of sin is the law. 57 But thanks be to God, which giveth us the victory through our Lord Jesus Christ. 58 Therefore, my beloved brethren, be ye stedfast, unmoveable, always abounding in the work of the Lord, forasmuch as ye know that your labour is not in vain in the Lord.
So where is the pulpit on the sabbath day that Paul supposedly preached from that you were talking about?
I know about the verses in Acts where they did missionary outreach to the Jews on the sabbath in the synagogue, but I do not believe the Jews would allowed them to hold a church service on that day, let alone in their Jewish synagogue.
Here is a verse from the Book of Acts that told me when they held service was when they came together regularly to hold communion.
Acts 20:7
And upon the first day of the week, when the disciples came together to break bread, Paul preached unto them, ready to depart on the morrow; and continued his speech until midnight. 8 And there were many lights in the upper chamber, where they were gathered together.
Now understand my point of view whether you believe it or not, because it sure reads to me on the first day of the week was when they were holding communion. Can you understand why I believe that?
Now don't get mad. Just lean on the Lord Jesus Christ for His ministry on the topic. A disciple bears more fruit when they get pruned.
John 15:1I am the true vine, and my Father is the husbandman. 2 Every branch in me that beareth not fruit he taketh away: and every branch that beareth fruit, he purgeth it, that it may bring forth more fruit.
Proverbs 27:17 Iron sharpeneth iron; so a man sharpeneth the countenance of his friend.