1 When he saw the crowds, he went up the mountain. After he sat down his disciples came to him. 2 Then he began to teach them by saying: 3 “Blessed are the poor in spirit, for the kingdom of heaven belongs to them. 4 Blessed are those who mourn, for they will be comforted. 5 Blessed are the meek, for they will inherit the earth. 6 Blessed are those who hunger and thirst for righteousness, for they will be satisfied. 7 Blessed are the merciful, for they will be shown mercy. 8 Blessed are the pure in heart, for they will see God. 9 Blessed are the peacemakers, for they will be called the children of God. 10 Blessed are those who are persecuted for righteousness, for the kingdom of heaven belongs to them. 11 Blessed are you when people insult you and persecute you and say all kinds of evil things about you falsely on account of me. 12 Rejoice and be glad because your reward is great in heaven, for they persecuted the prophets before you in the same way. Source

These are the things that have no definite quantity: The corners [of the field]. First-fruits; [The offerings brought] on appearing [at the Temple on the three pilgrimage festivals]. The performance of righteous deeds; And the study of the torah. The following are the things for which a man enjoys the fruits in this world while the principal remains for him in the world to come: Honoring one’s father and mother; The performance of righteous deeds; And the making of peace between a person and his friend; And the study of the torah is equal to them all. They should not leave peah of less than one-sixtieth [of the field]. But even though they said, “there is no measure for peah,” everything depends upon the size of the field, the number of poor people, and the extent of the yield. Source