Answer:
The two sections that contain a Biblical allusion are:
1. "Should I, after tea and cakes and ices,
Have the strength to force the moment to its crisis?"
2. "To have squeezed the universe into a ball
To roll it toward some overwhelming question,"
These lines allude to the biblical story of John the Baptist, who was beheaded at the request of Salome after she danced for King Herod. John the Baptist's head was brought to Herod on a platter. This is referenced metaphorically in the excerpt.