Names #13, #900 · Viṣṇu Sahasranāma
अव्ययःavyayaḥ
Avyaya — appears 2 times in the stotram, each with its own meaning
Name #13
Imperishable — he who never changes or decays
From shloka 2 · chapter Matsya
पूतात्मा परमात्मा च मुक्तानां परमा गतिः ।
अव्ययः पुरुषः साक्षी क्षेत्रज्ञोऽक्षर एव च ॥
pūtātmā paramātmā ca muktānāṃ paramā gatiḥ
avyayaḥ puruṣaḥ sākṣī kṣetrajño'kṣara eva ca
Also in this shloka: pūtātmā · paramātmā · muktānāṃ paramā gatiḥ · puruṣaḥ · sākṣī · kṣetrajñaḥ · akṣaraḥ
Name #900
The changeless, into whom all returns
From shloka 96 · chapter Buddha
सनात्सनातनतमः कपिलः कपिरव्ययः ।
स्वस्तिदः स्वस्तिकृत्स्वस्ति स्वस्तिभुक्स्वस्तिदक्षिणः ॥
sanātsanātanatamaḥ kapilaḥ kapiravyayaḥ
svastidaḥ svastikṛtsvasti svastibhuksvastidakṣiṇaḥ
Also in this shloka: sanāt · sanātanatamaḥ · kapilaḥ · kapiḥ · svastidaḥ · svastikṛt · svasti · svastibhuk · svastidakṣiṇaḥ