Numbers 31:34-36

New English Translation

³⁴61,000 donkeys, ³⁵and 32,000^[a] young women who had not experienced a man’s bed.^[b]

³⁶The half portion of those who went to war numbered 337,500 sheep;

Numbers 31:35 sn Here again we encounter one of the difficulties of the book, the use of the large numbers. Only 12,000 soldiers fought the Midianites, but they brought back this amount of plunder, including 32,000 girls. Until a solution for numbers in the book can be found, or the current translation confirmed, one must remain cautious in interpretation.
Numbers 31:35 tn Heb “who have not known a man’s bed.” The verb יָדָע (yadaʿ) “to know,” “be intimate with,” is used as a euphemism for sexual relations.

New English Translation (NET)