Verses with the word weariness in the Old Testament (2 verses):

Ecclesiastes 12:12
And further, by these, my son, be admonished: of making many books there is no end; and much study is a weariness of the flesh.

Malachi 1:13
Ye said also, Behold, what a weariness is it! and ye have snuffed at it, saith the LORD of hosts; and ye brought that which was torn, and the lame, and the sick; thus ye brought an offering: should I accept this of your hand? saith the LORD.