Question

what is known as Sermon on the mount

Answer 1

The Sermon is the longest continuous section of Jesus speaking found in the New Testament, and has been one of the most widely quoted elements of the Canonical Gospels. It includes some of the best known teachings of Jesus, such as the Beatitudes, and the widely recited Lord's Prayer. The Sermon on the Mount is generally considered to contain the central tenets of Christian discipleship.
Collectively known as sermon on the mount

Answer 2

The Sermon On The Mount is the collection of sayings and teachings of Jesus Christ, which emphasizes his moral teaching found in the Gospel of Matthew.

(Chapters 5,6 and 7)