The recitation performed by those great persons was a mental Yapa. On account of their hearts, having been entirely fixed upon Him, Hari became highly gratified with them.
मानसो नाम स जपो जप्यते तैर्महात्मभिः॥ तेनैकाग्रमनस्त्वेन प्रीतो भवति वै हरिः।