こととて

conjunction

because; since; given that

Formal, somewhat literary conjunction used to state a reason or circumstance, often with a nuance of apology or explanation. Typically follows a noun or the attributive form of a verb/adjective. Common in business letters and formal speech.

• 初はじめてのこととて、不ふ手て際ぎわがありましたらお許ゆるしください。

  As this is my first time, please forgive any shortcomings.

• 子こ供どものしたこととて、どうか大おお目めに見みてやってください。

  Since it was something a child did, please overlook it.