Surely you remember, brothers and sisters, our toil and hardship; we worked night and day in order not to be a burden to anyone while we preached the gospel of God to you.
NIV
For you recall our hard toil and struggles, brethren. We worked night and day [and plied our trade] in order not to be a burden to any of you [for our support] while we proclaimed the glad tidings (the Gospel) of God to you.
AMP
For ye remember, brethren, our labour and travail: for labouring night and day, because we would not be chargeable unto any of you, we preached unto you the gospel of God.
KJV