1 Kings 1:5

1:5 Now Adonijah, son of David and Haggith, was promoting himself, boasting, “I will be king!” He managed to acquire chariots and horsemen, as well as fifty men to serve as his royal guard.

1 Kings 18:4

18:4 When Jezebel was killing the Lord’s prophets, Obadiah took one hundred prophets and hid them in two caves in two groups of fifty. He also brought them food and water.)