How many times is the phrase 'observe the festival' mentioned in the Bible?

Answer 1

1. 1 Kings 8:65

   So Solomon observed the festival at that time, and all Israel with him-a vast assembly, people from Lebo Hamath to the Wadi of Egypt. They celebrated it before the LORD our God for seven days and seven days more, fourteen days in all.

   1 Kings 8:64-66 (in Context) 1 Kings 8 (Whole Chapter)

2. 2 Chronicles 7:8

   So Solomon observed the festival at that time for seven days, and all Israel with him-a vast assembly, people from Lebo Hamath to the Wadi of Egypt.

   2 Chronicles 7:7-9 (in Context) 2 Chronicles 7 (Whole Chapter)