Hi Rivers:
I followed your advice, and using Google Books did a search for the exact words, "sufficient clothes." I looked through the first two pages of 100 results on each page. It appeared in numerous secular contexts starting in the mid-1800s in the texts that came up in the search. My guess is that it was a common usage in wide circulation. This doesn't rule out that Lemon had a Biblical allusion in mind, but it strongly suggests that there are other possibilities.
I followed your advice, and using Google Books did a search for the exact words, "sufficient clothes." I looked through the first two pages of 100 results on each page. It appeared in numerous secular contexts starting in the mid-1800s in the texts that came up in the search. My guess is that it was a common usage in wide circulation. This doesn't rule out that Lemon had a Biblical allusion in mind, but it strongly suggests that there are other possibilities.