Midrasch zu Dewarim 28:16

(Esth. 8, 16) For the Jews there was light, and joy and gladness and honor. R. Elazar, in the name of R. Juda, said: "Light, refers to the Torah, and so says the passage (Prov. 6, 23) For the commandment is a lamp, and the law is light. Joy, refers to a holiday, and so says the passage (Deut. 16, 14) And thou shalt rejoice in thy feast; gladness, refers to circumcision, and so says the passage (Ps. 119, 162) I am rejoiced over thy promise; honor, refers to Tephilin, and so says the passage (Deut. 28, 16) And all the nations of the earth shall see that thou are called by the name of the Lord, and they shall he afraid of thee. And we are taught in a Baraitha: R. Eliezer the Great said: 'This refers to the Tephilin on the head.' "