2 Corinthians 8:14 But by an equality, that now at this time your abundance may be a supply for their want, that their abundance also may be a supply for your want: that there may be equality:

The Apostle Paul reasons that the church that is in need is to receive needful help from other able churches. This time the church in Jerusalem requires the help of the churches in Corinth and Macedonia. A time may come when the situation is reversed, at that time, the church in Jerusalem is expected to readily come forward to help the churches in Macedonia or Corinth. In that sense, there is equality.

Indeed, when Israel as in the wilderness, there was no food, God provided the needful supply throughout the 40 years. In that sense, the churches with resources by them are encouraged to help those in need.