Isa_28:17  Judgment also will I lay to the line, and righteousness to the plummet: and the hail shall sweep away the refuge of lies, and the waters shall overflow the hiding place. (Isa 14:13 …  I will place the mount of the appointed times in the recesses to hide from discovery.) (in the light of the latter rain, it is as waters overwhelming sweeping away the lies of deception keeping The Most High’s people in disobedience to His High and Qodesh Commands.)

Righteousness to the plummet, a precision instrument, meaning gravity sways it toward the east a little on the morning of New Moon Day conjunction, also precision, as in critical analytical calculative deductive reasoning as in Isaiah 28:10 “line upon line” “precept upon precept” “here a little and there a little” as:
Isa 28:12  To whom he said, This is the rest wherewith ye may cause the weary to rest; and this is the refreshing: yet they would not hear. (That is saying, this is the true reckoning of His Moeds of Genesis 1:14-19)

Isa 28:7  But they also have erred through wine, and through strong drink are out of the way; the priest and the prophet have erred through strong drink, they are swallowed up of wine, they are out of the way through strong drink; they err in vision, they stumble in judgment. 
Isa 28:8  For all tables are full of vomit and filthiness, so that there is no place clean. 
Isa 28:9  Whom shall he teach knowledge? and whom shall he make to understand doctrine? them that are weaned from the milk, and drawn from the breasts. 

The lie “The weekly cycle is an unbreakable cycle of 7’s from creation week until now…” as this is the “untempered mortar”, not found in Scripture.

Eze_13:10  Because, even because they have seduced my people, saying, Peace; and there was no peace; and one built up a wall, (a calendar) and, lo, others daubed it with untempered morter: (The refuge of The Lie, the weekly cycle is an unbreakable cycle of 7’s)

Eze 13:11  Say unto them which daub it with untempered morter, that it shall fall: there shall be an overflowing shower; and ye, O great hailstones, shall fall; and a stormy wind shall rend it.
Eze 13:12  Lo, when the wall is fallen, shall it not be said unto you, Where is the daubing wherewith ye have daubed it? 
Eze 13:13  Therefore thus saith Yehovah Elohim; I will even rend it with a stormy wind in my fury; and there shall be an overflowing shower in mine anger, and great hailstones in my fury to consume it. 
Eze_13:14  So will I break down the wall that ye have daubed with untempered morter, and bring it down to the ground, so that the foundation thereof shall be discovered, and it shall fall, and ye shall be consumed in the midst thereof: and ye shall know that I am Yehovah.
Eze_13:15  Thus will I accomplish my wrath upon the wall, and upon them that have daubed it with untempered morter, and will say unto you, The wall is no more, neither they that daubed it;