Yajna Means Work for Vishnu
yajnesvar bhagavaner santos lagiya
niyamita karma kara asakti tyajiya
ar yata karma hay bandhera karana
ataeva sei karya kara nivarana
bhagavada santosartha karmera prasanga
yata kichu acarana saba mukta sanga
Work done as a sacrifice for Visnu has to be performed, otherwise work causes bondage in this material world. Therefore, O son of Kunti, perform your prescribed duties for His satisfaction, and in that way you will always remain free from bondage.
– Srila Prabhupada, Gitar Gaan – Bengali Poetic Edition of Bhagavad-gītā As It Is – Chapter 3 – Verse 9
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Many people accept this meaning but they use the other one,
for interpreting Bhagavad Gita in their way.