に手を当てた

put one's hand on

→ に
phrase Rare #38,955
put one's hand on Used for placing a hand on a person or body part; 手を当てた is the past form.
JA: 彼はお腹に手を当てた。
EN: He put his hand on his stomach.

彼は額に手を当てた。

He put his hand to his forehead.

彼は胸に手を当てた。

He put his hand on his chest.

彼女は額に手を当てた。

She put her hand to her forehead.

彼女は胸に手を当てた。

She put her hand on her chest.