1. Name and Date of the Festival

Leviticus 23:36,39
Numbers 29:35
2 Chronicles 7:9
Nehemiah 8:18

2. Mikra Kodesh Holy Assembly, Rest from Melacha

Leviticus 23:36,39
Numbers 29:35

3. Festival (Additional) Sacrifice

Leviticus 23:36
Numbers 29:36-38

4. Tefillat HaGeshem General Prayer for Rain

Mishnah Succah
Talmud Yoma 21b.

5. Public Torah reading, set by Moses

Jerusalem Talmud