Philippians 1:5-6

1:5 because of your participation in the gospel from the first day until now. 1:6 For I am sure of this very thing, that the one who began a good work in you will perfect it until the day of Christ Jesus.

Philippians 1:10

1:10 so that you can decide what is best, and thus be sincere and blameless for the day of Christ,

Philippians 2:16

2:16 by holding on to the word of life so that on the day of Christ I will have a reason to boast that I did not run in vain nor labor in vain.