Surely you recall, brothers, our labor and toil. We worked night and day so that we would not be a burden to anyone while we proclaimed to you the gospel of God.
KJV
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.
ASV
For ye remember, brethren, our labor and travail: working night and day, that we might not burden any of you, we preached unto you the gospel of God.