The number 144 shows up 4x within the Lord's Salvation Plans
Old World Individuals - 144
The Lord utilized Individuals such as Noah to spread His Word.
Genesis 6:8-9 But Noah found grace in the eyes of the LORD. These are the generations of Noah: Noah was a just man and perfect in his generations, and Noah walked with God.
Noah preached the warning of God for 120 years that judgment was coming as he built the Ark.
Genesis 6:3 And the LORD said, My spirit shall not always strive with man, for that he also is flesh: yet his days shall be an hundred and twenty years.
These 120 years equalled a total of 1440 months.
The Nation of Israel - 144
The Lord utilized the Temple with Priests to spread His Word.
Exodus 19:6 And ye shall be unto me a kingdom of priests, and an holy nation. These are the words which thou shalt speak unto the children of Israel.
This kingdom of priests began in 1447BC after leaving Egypt and ended with the birth of the final High Priest, Jesus Christ in 7BC.
Hebrews 4:14 Seeing then that we have a great high priest, that is passed into the heavens, Jesus the Son of God, let us hold fast our profession.
From 1447BC until 7BC there are a total of 1440 years.
The Global Church Age - 144
The Lord utilized the Church with its congregation to spread His Word.
Acts 13:43 Now when the congregation was broken up, many of the Jews and religious proselytes followed Paul and Barnabas: who, speaking to them, persuaded them to continue in the grace of God.
Those whom were saved during the Church Age were symbolized as the 144,000.
Revelation 14:1 And I looked, and, lo, a Lamb stood on the mount Sion, and with him an hundred forty and four thousand, having his Father's name written in their foreheads.
God identified the Church kingdom with the 144,000.
The Great Multitude - 144
The Lord utilized Individuals called the "Great Multitude" to spread His Word.
Revelation 7:9 After this I beheld, and, lo, a great multitude, which no man could number, of all nations, and kindreds, and people, and tongues, stood before the throne, and before the Lamb, clothed with white robes,
This Great Multitude are the final group that will enter into the New Jerusalem.
Revelation 21:17 And he measured the wall thereof, an hundred and forty and four cubits, according to the measure of a man, that is, of the angel.
The walls of salvation of the New Jerusalem are a total of 144,000 cubits.