Comentario citado sobre II Reyes 3:22

המחנה האחת והכהו TO THE ONE CAMP AND SMITE IT — The word מחנה is treated grammatically as masculine or feminine: in (Psalms 27:3) “Though a camp should encamp (תחנה) against me” it is feminine; in (Genesis 33:8) “this (הזה) camp” it is masculine. Similarly there are other words treated grammatically as both masculine and feminine. For example, the word שמש in (Genesis 19:23) “The sun was risen (יצא) upon the earth” and in (Psalms 19:7) “His (the sun’s) going forth (מוצאו) is from the end of the heaven”; here it is masculine, but in (2 Kings 3:22) “and the sun shone (זרחה) upon the water” it is feminine. Similarly with רוח: in (Job 1:19) “and behold there came (באה) a great wind” it is feminine, and in the same verse “and smote (ויגע) the four corners of the house” it is masculine; in (1 Kings 19:11) “and a great (גדולה) and strong (וחזק) wind rent (מפרק) the mountains” it is both masculine and feminine. So also in the case of אש: in (Numbers 16:35) “and fire came forth (יצאה) from the Lord” it is feminine, and in (Psalms 104:4) “The flaming (להט) fire” it is masculine.

ויקרא שמו זרח, “he named him Zerach”. He was reddish skinned, and the word זרח appears in that sense in Kings II 3,22.

זרח. On account of the woolen thread which was red in colour. The word זרח basically means red, such as the colour of the sun at the time it rises and when it sets. If it does not appear red during the day this is because of the excess amount of light during those hours making it impossible for us to notice the red colour behind all that light. We find confirmation of the redness of the sun in Kings II 3,22 when the Moabites were deceived by believing that the rising sun’s redness represented blood remaining from a violent battle and they thought they could then simply move over to the camp of the Israelites and pick up the spoils.