Sources-The Pesach Festival

The period and dates of the Festival:

Exodus 23:15
Exodus 34:18
Leviticus 23:5-8
Numbers 9:1-5
Numbers 28:16-18,25.
Deuteronomy 16:1,4,8.

Names of the Festival:

Exodus 12:14
Exodus 13:6
Exodus 23:15
Exodus 34:18,25
Leviticus 23:15,34
Deuteronomy 16:8

Pilgrimage on the three pilgrim festivals:

Exodus 23:17
Exodus 34:20,23-24
Deuteronomy 16:16-17

Pesach in Egypt:

Exodus 12:3-11,21-22,43-48.

Pesach subsequently:

Exodus 12:14,17,24-25
Exodus 13:3,5,10
Exodus 23:18
Exodus 34:25
Leviticus 23:5
Numbers 9:2-5,13
Numbers 28:16
Deuteronomy 16:1-7
Joshua 5:10-11
2 Kings 23:21-23
2 Chronicles 30:21-27
2 Chronicles 35:1-19
Ezra 6:19-22

Additional (musaf) sacrifice on Pesach:

Leviticus 23:8
Numbers 28:18-24

Matsot:

Exodus 12:15,17-18,20,34,39
Exodus 13:6
Exodus 23:15
Exodus 34:18
Numbers 28:17
Deuteronomy 16:3,8

Ban on leaven (yeast) and leavened bread

Exodus 12:15,19-20
Exodus 13:3,7
Deuteronomy 16:3-4

Solemn assembly and ban on certain activities

Exodus 12:16
Leviticus 23:4-8
Numbers 28:18,25
Deuteronomy 16:8

Exodus 23:15
Exodus 34:18
Leviticus 23:5-8
Numbers 9:1-5
Numbers 28:16-18,25.
Deuteronomy 16:1,4,8.

Names of the Festival:

Exodus 12:14
Exodus 13:6
Exodus 23:15
Exodus 34:18,25
Leviticus 23:15,34
Deuteronomy 16:8

Pilgrimage on the three pilgrim festivals:

Exodus 23:17
Exodus 34:20,23-24
Deuteronomy 16:16-17

Pesach in Egypt:

Exodus 12:3-11,21-22,43-48.

Pesach subsequently:

Exodus 12:14,17,24-25
Exodus 13:3,5,10
Exodus 23:18
Exodus 34:25
Leviticus 23:5
Numbers 9:2-5,13
Numbers 28:16
Deuteronomy 16:1-7
Joshua 5:10-11
2 Kings 23:21-23
2 Chronicles 30:21-27
2 Chronicles 35:1-19
Ezra 6:19-22