'First' in the Bible

Attached to the first chariot were red horses. Attached to the second chariot were black horses.

The LORD will deliver the tents of Judah first, so that neither the glory of the house of David nor the glory of the inhabitants of Jerusalem overshadows Judah.

The entire land will become like the Arabah plain from Geba to Rimmon, south of Jerusalem. It will be raised up and inhabited where it is, from the Gate of Benjamin to the First Gate, then to the Corner Gate, to the Hananel Tower, and to the king's winepresses.