When will the twelve tribes be scattered abroad? It's not talking about the diaspora in Acts 8 for sure because the twelve tribes were not scattered abroad.
James 5
1 Go to now, ye rich men, weep and howl for your miseries that shall come upon you.
2 Your riches are corrupted, and your garments are motheaten.
3 Your gold and silver is cankered; and the rust of them shall be a witness against you, and shall eat your flesh as it were fire. Ye have heaped treasure together for the last days.
Being rich in the tribulation means you sold out to the anti-christ. Being rich in the Church Age is not a bad thing. Paul instructs those that are rich to use their riches for good.
7 Be patient therefore, brethren, unto the coming of the Lord. Behold, the husbandman waiteth for the precious fruit of the earth, and hath long patience for it, until he receive the early and latter rain.
8 Be ye also patient; stablish your hearts: for the coming of the Lord draweth nigh.
9 Grudge not one against another, brethren, lest ye be condemned: behold, the judge standeth before the door.
During the tribulation, the coming of the Lord is literally at hand with the Judge standing at the door ready to judge the nations. During the Church Age Paul says the Lord is seated at the right hand of the Father.
10 Take, my brethren, the prophets, who have spoken in the name of the Lord, for an example of suffering affliction, and of patience.
11 Behold, we count them happy which endure. Ye have heard of the patience of Job, and have seen the end of the Lord; that the Lord is very pitiful, and of tender mercy.
Why Job? Job is a great example of one enduring great tribulation with patience and endurance with his end greater than his beginning.
17 Elias was a man subject to like passions as we are, and he prayed earnestly that it might not rain: and it rained not on the earth by the space of three years and six months.
18 And he prayed again, and the heaven gave rain, and the earth brought forth her fruit.
Why Elijah? Elijah will be one of the witnesses during the 3 1/2 years of great tribulation causing it not to rain. Elijah is prophesied as coming before the Lord.