1 Chronicles 23:5

Moreover four thousand were porters
At the east, north, and south gates of the temple, in their turns;

and four thousand praised the Lord with the instruments;
were singers in the temple, which in all made up 38,000:

which I made, said David, to praise therewith;
which instruments he devised and ordered to be made to praise the Lord with; see ( 2 Chronicles 29:26 ) ( Nehemiah 12:36 ) .