Names #445, #971 · Viṣṇu Sahasranāma
यज्ञःyajñaḥ
Yajna — appears 2 times in the stotram, each with its own meaning
Name #445
The sacrifice itself
From shloka 48 · chapter Vāmana
यज्ञ इज्यो महेज्यश्च क्रतुः सत्रं सतां गतिः ।
सर्वदर्शी विमुक्तात्मा सर्वज्ञो ज्ञानमुत्तमम् ॥
yajña ijyo mahejyaśca kratuḥ satraṃ satāṃ gatiḥ
sarvadarśī vimuktātmā sarvajño jñānamuttamam
Also in this shloka: ijyaḥ · mahejyaḥ · kratuḥ · satram · satāṃ gatiḥ · sarvadarśī · vimuktātmā · sarvajñaḥ · jñānamuttamam
Name #971
Sacrifice itself
From shloka 104 · chapter Kalki
भूर्भुवःस्वस्तरुस्तारः सविता प्रपितामहः ।
यज्ञो यज्ञपतिर्यज्वा यज्ञाङ्गो यज्ञवाहनः ॥
bhūrbhuvaḥsvastarustāraḥ savitā prapitāmahaḥ
yajño yajñapatiryajvā yajñāṅgo yajñavāhanaḥ
Also in this shloka: bhūrbhuvaḥsvastaruḥ · tāraḥ · savitā · prapitāmahaḥ · yajñapatiḥ · yajvā · yajñāṅgaḥ · yajñavāhanaḥ