en_tn/act/01/12.md

Then they returned

"the apostles returned"

a sabbath day's journey

A rule the Pharasees made to keep people from doing work on the sabbath.

When they arrived

"When they reached their destination in Jerusalem"

upper chamber

a room on a higher level of the house.

Simon the Zealot

"Simon the Patriot." There were many Zealots. But Simon may have been the only apostle who was a Zealot. The Zealots wanted to make the Romans stop ruling over Israel.

They were all united as one

The group was united and did not have divisions or strife.

as they diligently continued in prayer

"as they devoted themselves together to pray"