They crossed is based on a suggested correction of the Masoretic Text, which is literally “the crossing crossed.” Critique Textuelle de l’Ancien Testament gives a {C} evaluation to the MT here and, following an ancient Jewish interpretation, Critique Textuelle de l’Ancien Testament suggests that the noun “crossing” also meant “a ferry [boat].” Critique Textuelle de l’Ancien Testament therefore recommends the translation “the ferry crossed” (so Bible de Jérusalem, 1998). Perhaps this understanding of the Hebrew is also the basis for the translation “crossed to and fro” (Revised English Bible). Revised Standard Version and Good News Translation (they crossed) are based on a change of the final letter of this Hebrew verb. The Septuagint has “they performed the service,” and this text is followed by New Jerusalem Bible, which says “and they worked manfully.” Since the Hebrew words “crossed” and “worked” are similar in spelling, as are the Hebrew nouns “crossing” and “work,” it is likely that the Septuagint is based on a scribe’s misreading of the Hebrew text. Translators should follow the recommendation of Critique Textuelle de l’Ancien Testament here.

Ford: although the Hebrew vocabulary is slightly different here, this refers to the same sort of crossing place as mentioned in 15.28; 17.16; and 1 Sam 13.7. The men crossed the river at a place that was particularly well suited for crossing and was habitually used for this purpose by many people.

The king’s household: that is, the members of the king’s family, and this probably included whatever possessions they may have had with them.

To do his pleasure: literally “to do the good in his eyes.” In addition to helping the royal family across the river, the Benjaminites were prepared to do anything else that David may have wanted them to do. Some may translate “to do anything that he asked them to do” or “to do whatever he wished” (New American Bible).

Quoted with permission from Omanson, Roger L. and Ellington, John E. A Handbook on the First and Second Books of Samuel, Volume 2. (UBS Helps for Translators). New York: UBS, 2001. For this and other handbooks for translators see here .