'Promised' in the Bible

So then, being always filled with good courage and confident hope, and knowing that while we are at home in the body we are absent from the Lord—

That is why I thought it necessary to urge these brothers to go to you [before I come] and make arrangements in advance for this generous, previously promised gift of yours, so that it would be ready, not as something extorted [or wrung out of you], but as a [voluntary and] generous gift.