1 Corinthians 15:58 (ESV)
58 Therefore, my beloved brothers, be steadfast, immovable, always abounding in the work of the Lord, knowing that in the Lord your labor is not in vain.
1 Corinthians 16:1–11 (ESV)
1 Now concerning the collection for the saints: as I directed the churches of Galatia, so you also are to do. 2 On the first day of every week, each of you is to put something aside and store it up, as he may prosper, so that there will be no collecting when I come. 3 And when I arrive, I will send those whom you accredit by letter to carry your gift to Jerusalem. 4 If it seems advisable that I should go also, they will accompany me. 5 I will visit you after passing through Macedonia, for I intend to pass through Macedonia, 6 and perhaps I will stay with you or even spend the winter, so that you may help me on my journey, wherever I go. 7 For I do not want to see you now just in passing. I hope to spend some time with you, if the Lord permits. 8 But I will stay in Ephesus until Pentecost, 9 for a wide door for effective work has opened to me, and there are many adversaries. 10 When Timothy comes, see that you put him at ease among you, for he is doing the work of the Lord, as I am. 11 So let no one despise him. Help him on his way in peace, that he may return to me, for I am expecting him with the brothers.