What was the three words that papa grande often said to Tomas?

The three words that Papa Grande often said to Tomas in "The House on Mango Street" were "You will always be my son."

This phrase holds significant weight for Tomas, as he is the son of Papa Grande but not Esperanza's father. Papa Grande's love for Tomas is evident in his repeated statement, which provides Tomas with a sense of belonging and acceptance.