And he prayed again - The allusion here seems to be to 1-Kings 18:42, 1-Kings 18:45, though it is not expressly said there that he prayed. Perhaps it might be fairly gathered from the narrative that he did pray, or at least that would be the presumption, for he put himself into a natural attitude of prayer. "He cast himself down upon the earth, and put his face between his knees," 1-Kings 18:42. In such circumstances, it is to be fairly presumed that such a man would pray; but it is remarkable that it is not expressly mentioned, and quite as remarkable that James should have made his argument turn on a thing which is not expressly mentioned, but which seems to have been a matter of inference. It seems probable to me, therefore, that there was some tradition on which he relied, or that it was a common interpretation of the passage in 1 Kings, that Elijah prayed earnestly, and that this was generally believed by those to whom the apostle wrote. Of the fact that Elijah was a man of prayer, no one could doubt; and in these circumstances the tradition and common belief were sufficient to justify the argument which is employed here.
And the heaven gave rain - The clouds gave rain. "The heaven was black with clouds and wind, and there was a great rain," 1-Kings 18:45.
And the earth brought forth her fruit - The famine ceased, and the land again became productive. The case referred to here was indeed a miracle, but it was a case of the power of prayer, and therefore to the point. If God would work a miracle in answer to prayer, it is reasonable to presume that he will bestow upon us the blessings which we need in the same way.

And he prayed again - This second prayer is not mentioned in the history in express words, but as in 1-Kings 18:42, it is said, He cast himself down upon the earth, and put his face between his knees; that was probably the time of the second praying, namely, that rain might come, as this was the proper posture of prayer.

And he prayed again,.... 1-Kings 18:42. Here also is no express mention of his prayer, but it may be concluded from his gestures; and so the Jewish interpreters understand these words, "Elijah went up to the top of Carmel", "to pray, and he cast himself down upon the earth", , "to pray for rain; and he put his face between his knees", "and prayed, and said to his servant, go up now, look toward the sea"; and this he said while he was "in his prayers" (i): and the effect of this his prayer was,
and the heaven gave rain; see 1-Kings 18:45.
And the earth brought forth her fruit: which for the years past it had not; hence there was a sore famine in the land, 1-Kings 18:2. Now the apostle chose to give this example, because it was a common thing for the Jews to ask for rain: we often read of such a doctor, that he prayed for rain, and it came; and of another, that he asked for the rains, and they descended (k): and his view is to observe, that the weakness and infirmities of the saints ought not to discourage them from prayer; and that they should be earnest and fervent in it, as was Elias, a man of like passions with themselves.
(i) Jarchi, Kimchi, Ralbag, & Laniado in loc. (k) T. Bab. Moed Katon, fol. 28. 1. & Taanith, fol. 19. 1. 23. 1. 24. 2. 25. 2. & Yoma, fol. 53. 2.

prayed . . . and--that is, "and so." Mark the connection between the prayer and its accomplishment.
her fruit--her usual and due fruit, heretofore withheld on account of sin. Three and a half years is the time also that the two witnesses prophesy who "have power to shut and open heaven that it rain not."

He prayed again - When idolatry was abolished.