Comprehension, language, and application

What shared meaning does «فَلْيُكْرِمْ» have in Hadith 246 and 251?

Rights of Guests and Neighbors, Worship, Sincerity, and Responsible Care (Hadith 246–252)

• It is always a past event
• It instructs honoring or caring, with different objects
• Both hadiths become the exact same topic
• It expresses absolute negation