Old Testament readings use the Septuagint , the Scripture the apostles quoted. Masoretic numbering shown for reference.Learn why
LXX

2 Samuel 1:21

Ye mountains of Gelbue, let not dew nor rain descend upon you, nor fields of first-fruits [be upon you], for there the shield of the mighty ones has been grievously assailed; the shield of Saul was not anointed with oil.

Read in other translations