руке

руке

"Руке" is the dative case of "рука," meaning "hand" or "arm" in English.

The word "руке" here is the prepositional case of "рука" and is used to indicate the object, 'hand', as the location where the gift is being held.

Этот подарок я держу в руке.

I am holding this gift in my hand.

In this sentence, "руке" is again the prepositional case of "рука"; it is used to describe the location (the ring is on the left hand).

Колечко на левой руке очень красивое.

The ring on the left hand is very beautiful.

Here, 'руке' as used metaphorically refers to the 'self-control or subject of decision in one's hand.' The form remains the prepositional case of 'рука'.

Не опускайся до чужой мысли в своей руке.

Do not lower yourself to someone else's thought in your own hand.