How to grep all files that have a keyword and files should be created today

Have a directory with files. how to grep all files with a particular keyword and files should be created today.

tried this :

grep -r -n "pass" *.json

this gives the line number and only searches json file but how to add pipe to search for only files that are created today

>Solution :

Use the find command as the source of the list of files to search.

grep -n "pass" $(find . -daystart -ctime 0 -name '*.json')

-ctime says "creation date should have been 0 days ago", and -daystart says to base it on the beginning of the day for "days ago", not "24 hours ago" ago.