Please list the phone numbers of the top 3 customers that have the highest credit limit and have Leslie Jennings as their sales representitive.
SELECT t1.phone FROM customers AS t1 INNER JOIN employees AS t2 ON t1.salesRepEmployeeNumber = t2.employeeNumber WHERE t2.firstName = 'Leslie' AND t2.lastName = 'Jennings' ORDER BY t1.creditLimit DESC LIMIT 3