Sankaracarya's Vivekachudamani 500

आकाशवल्लेपविदूरगोऽहं

आदित्यवद्भास्यविलक्षणोऽहम् ।

अहार्यवन्नित्यविनिश्चलोऽहं

अम्भोधिवत्पारविवर्जितोऽहम् ॥

ākāśavallepavidūrago'haṃ

ādityavadbhāsyavilakṣaṇo'ham |

ahāryavannityaviniścalo'haṃ

ambhodhivatpāravivarjito'ham ||

(Sankaracarya's Vivekachudamani 500)

Like space, I am beyond all contamination, like the sun I am distinct from things illumined, like the mountain I am always motionless, like the ocean I am limitless.

In this sloka Sripad Sankaracarya explaining his potentials. He is like space, there no place for contamination, He is like the radiant sun which always appears without anyone makes it bright. He is like the mountains which never move and He is like the ocean there is no limit. From this sloka, we can learn that He has no boundary and imperishable.