1 Chronicles 7:40

All these were sons (descendants) of Asher, heads of their fathers’ houses, choice men, courageous men, chiefs of the leaders. Their number, enrolled by genealogies for service in war, was 26,000 men.

2 Samuel 24:1-9

Now again the anger of the Lord burned against Israel, and He incited David against them to say, “Go, count [the people of] Israel and Judah.”

1 Chronicles 21:1-5

Satan [the adversary] stood up against Israel and incited David to count [the population of] Israel.

Treasury of Scripture Knowledge

Summary

All these were the children of Asher, heads of their father's house, choice and mighty men of valour, chief of the princes. And the number throughout the genealogy of them that were apt to the war and to battle was twenty and six thousand men.

Bible References

The number

1 Chronicles 21:1
Satan [the adversary] stood up against Israel and incited David to count [the population of] Israel.
2 Samuel 24:1
Now again the anger of the Lord burned against Israel, and He incited David against them to say, “Go, count [the people of] Israel and Judah.”