Update with a LIMIT in zend framework

I would like to do a update and place LIMIT 1 as precaution.
Here is my code:

$vals = array();
 $vals['status'] = 'closed';
 $where = $write->quoteInto('id =?', $orderID);
 
 $write->update("order", $vals ,$where);
 

Where can i add a LIMIT into this query?

(looks like has been asked in the past but i hope someone out there has the answer)

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