Before saying "Blessed are the poor in spirit," where did Jesus go up and sit down?

Answer: On the mountain

Seeing the crowds, Jesus went up on the mountain and sat down, and his disciples came to him as he began to teach.

“When Jesus saw the crowds, He went up on the mountain and sat down. His disciples came to Him, and He began to teach them, saying: “Blessed are the poor in spirit, for theirs is the kingdom of heaven.”— Matthew 5:1-3 (BSB)