Hadith 133 speaks of a بَيْتًا (house), whereas Hadith 138 speaks of a رُفْقَةً (traveling group). Both concern the company of angels, but the location and verbal action differ.
Hadith 133: لَا تَدْخُلُ الْمَلَائِكَةُ بَيْتًا — negation of entering.
Hadith 138: لَا تَصْحَبُ الْمَلَائِكَةُ رُفْقَةً — negation of accompanying.
The pronoun changes from فِيهِ (“in the house”) to فِيهَا (“in the group”). This is a useful illustration of how Arabic pronouns refer back to different nouns.