A dictionary of Proverbs (Oxford Paperback Reference)

nowt see also when in DOUBT, do nowt; HEAR all, see all, say nowt.
number see there is LUCK in odd numbers; there is SAFETY in numbers.
nut see the GODS send nuts to those who have no teeth.
When the OAK is before the ash, then you will only get a splash; when the ash is before the oak, then you may expect a soak
A traditional way of predicting whether the summer will be wet or dry on the basis of whether the oak or the ash is first to come into leaf in the spring.

• 
  1852 Notes & Queries 1st Ser. V 581 When the oak comes out before the ash, there will be fine weather in harvest. I.. find it generally correct. 1911 Times Literary Supplement 4 Aug. 285 One of the commonest weather rhymes in most parts of England deals with the budding of the oak and the ash:—When the oak’s before the ash Then you’ll only get a splash, When the ash is before the oak Then you may expect a soak. But in North Germany the signs are exactly inverted, and also in Cornwall. 1987 Daily Telegraph 22 June 12 My farmer neighbour and myself have always been great believers in the saying: ‘Ash before oak, we’ll get a soak Oak before ash, we’ll only have a splash.’ ■weather lore
  

Beware of an OAK, it draws the stroke; avoid an ash, it counts the flash; creep under the thorn, it can save you from harm
Advice on where to shelter from lightning during a thunderstorm.

• 
  1878 Folk-Lore Record I. 43 Mothers teach their children to say—Beware of an oak, It draws the stroke; Avoid an ash; It counts the flash; Creep under the thorn, It can save you from harm. 1945 F. THOMPSON Lark Rise xvii. Some one would.. warn him to keep away from trees during a thunderstorm. .. Others would quote: Under oak there comes a stroke, Under elm there comes a calm, And under ash there comes a crash. ■necessity; security