Based on the search results provided, there is no specific mention of the largest gathering during Jesus' ministry. However, we can infer some information about significant gatherings during Jesus' time:
1. Jesus' ministry involved preaching to large crowds. The Gospels mention numerous instances of Jesus addressing multitudes of people, though exact numbers are not always provided[1].
2. One of the largest gatherings mentioned in the Gospels is the feeding of the 5,000, where Jesus miraculously fed a crowd of about 5,000 men, plus women and children, with five loaves and two fish[1].
3. The early Christian church, which grew out of Jesus' ministry, saw rapid growth. Acts 2:41 mentions that about 3,000 people were added to the church in a single day after Peter's sermon at Pentecost[2].
4. Before this growth, the core group of Jesus' followers numbered about 120 disciples, who were present in the upper room after Jesus' ascension[2].
While these examples give us an idea of the scale of gatherings during and immediately after Jesus' ministry, the search results don't provide a definitive answer about the single largest gathering during Jesus' missionary work. The feeding of the 5,000 is likely one of the largest specific gatherings mentioned during Jesus' active ministry.
Sources
[1] Ministry of Jesus - Wikipedia https://en.wikipedia.org/wiki/Ministry_of_Jesus
[2] The One Hundred and Twenty Disciples https://impactdisciples.com/the-one-hundred-and-twenty-disciples/
[3] The Great Gathering: When Jesus Brings Everyone Home https://rachelstarrthomson.com/2021/11/08/the-great-gathering-when-jesus-brings-everyone-home/
[4] Lausanne I: The International Congress on World Evangelization https://lausanne.org/gathering/lausanne-1974
[5] The Many Facets of Gathering - Canada https://ca.churchofjesuschrist.org/the-many-facets-of-gathering