Then those who responded [by faith] to the words [spoken by Peter and the apostles] were immersed, and about three thousand persons were added to them [i.e., the apostles] on that day.
Therefore, my dearly loved brothers, stand firm [in the faith]; do not be moved [from your commitment] Always do your best to work for the Lord, since you know that your labor in the Lord’s [service] is not for nothing.