Names #53, #436 · Viṣṇu Sahasranāma
स्थविष्ठःsthaviṣṭhaḥ
Sthavishtha — appears 2 times in the stotram, each with its own meaning
Name #53
The most massive — vaster than all
From shloka 6 · chapter Matsya
अप्रमेयो हृषीकेशः पद्मनाभोऽमरप्रभुः ।
विश्वकर्मा मनुस्त्वष्टा स्थविष्ठः स्थविरो ध्रुवः ॥
aprameyo hṛṣīkeśaḥ padmanābho'maraprabhuḥ
viśvakarmā manustvaṣṭā sthaviṣṭhaḥ sthaviro dhruvaḥ
Also in this shloka: aprameyaḥ · hṛṣīkeśaḥ · padmanābhaḥ · amaraprabhuḥ · viśvakarmā · manuḥ · tvaṣṭā · sthaviro dhruvaḥ
Name #436
The most immense
From shloka 47 · chapter Vāmana
अनिर्विण्णः स्थविष्ठोऽभूर्धर्मयूपो महामखः ।
नक्षत्रनेमिर्नक्षत्री क्षमः क्षामः समीहनः ॥
anirviṇṇaḥ sthaviṣṭho'bhūrdharmayūpo mahāmakhaḥ
nakṣatranemirnakṣatrī kṣamaḥ kṣāmaḥ samīhanaḥ
Also in this shloka: anirviṇṇaḥ · abhūḥ · dharmayūpaḥ · mahāmakhaḥ · nakṣatranemiḥ · nakṣatrī · kṣamaḥ · kṣāmaḥ · samīhanaḥ