11 Grk “in which you exult.”
12 The oldest and best witnesses lack the verb (א* B, along with 1505 ), but most (𝔓72 א2 A C P Ψ 048 33 1739 𝔐) have ἐστίν here (estin, “[if] it is [necessary]”). The verb looks to be an explanatory gloss. But if no verb is present, this opens up the time frame in the author’s mind even more, since the conditional particle for both the first class condition and the fourth class condition is εἰ (ei). That may well be what was on the author’s mind, as evidenced by some of his other allusions to suffering in this little letter (3:14, 17). has the verb in brackets, indicating doubts as to its authenticity. Grk “Though now, for a little while if necessary, you may have to suffer.”

In other versions

In this you rejoice, though now for a little while, if necessary, you have been grieved by various trials,

In all this you greatly rejoice, though now for a little while you may have had to suffer grief in all kinds of trials.

You rejoice in this, even though now for a short time, if necessary, you suffer grief in various trials

So be truly glad. There is wonderful joy ahead, even though you must endure many trials for a little while.

in which you rejoice greatly, although now for a short time, if necessary, you are distressed by various trials,

Wherein ye greatly rejoice, though now for a season, if need be, ye are in heaviness through manifold temptations:

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