1 Chronicles 14:14 -

Go not up after them; turn away from them, and come upon them over against the mulberry trees . The meaning of the directions as here given is sufficiently evident, yet it is somewhat more forcibly expressed in the parallel place, "Thou shalt not go up," i.e. "against the Philistines" (see our tenth verse, and note the form of David's inquiry); " but fetch a compass behind them ." The mulberry trees were evidently behind the Philistines. The Hebrew word for the trees here spoken of is הַבְּכָאִים , and the correct rendering of it is probably neither "mulberry" nor, as the Septuagint and Vulgate translate, "pear" trees. But judging from the probable derivation ( בָּכָה , to weep), they were trees of the balsam species, and it seems that this is as far as we can safely conjecture. One of the latest authorities pronounces it an "unknown species." The tree, strange to say, is only mentioned here and in the parallel place. A summary of opinions as to the tree intended may be found in Smith's 'Bible Dictionary,' 2:439, and this is just sufficient to show that it is not as yet identified with any semblance of certainty. However, it is easy to understand hew the balsam species, from which the exuding gum resembles "tears," might come by the name set forth in the present Hebrew root.