C. F. Keil and Franz Delitzsch on 1 Kings 10:26-27

1Ki 10:26-27 1Ki 10:26 is simply a repetition of 1Ki 5:6 (compare also 1Ki 9:19); and 1Ki 10:27 is merely a further extension of 1Ki 10:21. The words of 1Ki 10:27, “Solomon made silver like stones in Jerusalem, and cedars like the sycamores in the lowland for abundance,” are a hyperbolical description of his collection of enormous quantities of precious metals and costly wood. שׁקמים, sycomori, mulberry fig-trees, are very rare in Palestine in its present desolate state (see Rob. Pal. iii. 27), and are only met in any abundance in Egypt; but in ancient times they abounded in the lowlands of Palestine to such an extent, that they were used as common building wood (vid., Isa 9:9, on which Theodoret observes, τούτων (συκαμίνων) ἡ Παλαιστίνη πεπλήρωται). According to 1Ch 27:28, the sycamore forests in the lowland of Judah were royal domains.