Hi Dima, this tutorial will show you how to get rid of the oil stain - https://www.hunker.com/13422976/how-to-remove-an-oil-stain-from-wood
small amount of mineral spirits
check this pin .. it always worked for me https://www.pinterest.com/pin/534872893230138984/
Blot first. Then I soak up what I can with baking soda overnight. A little Dawn dish detergent worked into should help.
Murphy's Oil Soap
We recommend Murphy Oil Soap. It has a unique, safe formula that was created specifically for wood (although it works for dozens of surfaces!). Make sure to use it properly: https://chemistrycachet.com/murphy-oil-soap-uses/