A dictionary of Proverbs (Oxford Paperback Reference)

weak see YORKSHIRE born and Yorkshire bred, strong in the arm and weak in the head.
The WEAKEST go to the wall
Usually said to derive from the installation of seating (around the walls) in the churches of the late Middle Ages. To go to the wall means figuratively ‘to succumb in a conflict or struggle’.

• 
  a 1500 Coventry Plays (EETS) 47 The weykist gothe eyuer to the walle. c 1595 SHAKESPEARE Romeo & Juliet I. i. 14 That shows thee a weak slave; for the weakest goes to the wall. 1714 DEFOE (title) The weakest go to the wall, or the Dissenters sacrific’d by all parties. 1834 MARRYAT Peter Simple I. v. You will be thrashed all day long. .. The weakest always goes to the wall there. 1888 C. M. DOUGHTY Travels in Arabia Deserta I. x. There perished many among them;.. it is the weak which go to the wall. 1916 ‘J. OXENHAM’ My Lady of Moor i. He saw to it that I had a good education,.. knowing the necessity and value of it in these strenuous days of the ‘weak to the wall’. 1955 T. WARRINER Doors of Sleep i. ‘As in the early church, the weakest go to the wall,’ the Archdeacon said, seating himself on the low parapet. ■ strength and weakness; winners and losers
  

weakest see also a CHAIN is no stronger than its weakest link.
wealthy see EARLY to bed and early to rise, makes a man healthy, wealthy, and wise.
wear see BETTER to wear out than to rust out; if the CAP fits, wear it; CONSTANT dropping wears away a stone; GIVE a thing, and take a thing, to wear the Devil’s gold ring; if the SHOE fits, wear it.
weary see be the DAY weary or be the day long, at last it ringeth to evensong.
weather see there is no such thing as BAD weather, only the wrong clothes; ROBIN Hood could brave all weathers but a thaw wind.