The brothers of Jesus advised him to go to Jerusalem and carry out his ministry during the Feast of Tabernacles. Jesus said that his time has not yet come. The Pharisees are looking for Jesus to kill him - so he goes secretly to Jerusalem.
Once he was at the temple, he went up there and taught the scripture. People wondered at his wisdom and knowledge. Some called him demon possessed. There is a huge division between the crowd talking about Jesus whether he is good or a deceiver.
Jesus taught in the temple, stressing numerous times that he was not acting on his own authority and the doctrine he was teaching was that on the One Who sent him. Few tried to seize him, but they could not, as his hour hour had not yet come.
During the feast of Tabernacle, there was a practice of priests drawing water from the pool of Shiloam and take it as a procession to the temple. They would then pour it at the base of altar as a means of thanking God for His provisions. Readings from Ezekiel 47 and Zechariah 14 were used as they mention the living water flowing from the temple.
John 7:37 On the last and greatest day of the festival, Jesus stood and said in a loud voice, “Let anyone who is thirsty come to me and drink.On hearing this, the reaction of the people is mixed. The temple police who were assigned to arrest Jesus returned to the Jewish leaders empty handed as they were captivated by his words. The leaders were nervous and acted negatively towards Jesus.
38 Whoever believes in me, as Scripture has said, rivers of living water will flow from within them.”