せやさかい

so; because of (that); therefore

Word type: 

Standard: 

そうだから

Example: 

A: あ〜、眠いわあ。
B: せやさかい、昨日早よ寝えって言うたやん。

A: Ahhh...I'm tired.
B: Because of that, I told you yesterday that you should go to bed early.

Commentary: 

Also see そやさかい and the grammar point for さかい.