Charles Ellicott Commentary 2 Chronicles 15:11

"And they sacrificed unto Jehovah in that day, of the spoil which they had brought, seven hundred oxen and seven thousand sheep." — 2 Chronicles 15:11 (ASV)

The same time. — On that day; namely, the day appointed for the festival, in the third month, that is, Sivan, corresponding to part of May and June.

Of the spoil which they had brought. — The spoil of Zerah, the cities around Gerar, and the nomadic tribes (2 Chronicles 14:13–15).