Please look very carefully inside his left sleeve and at the several little packets inside the large pockets of his jacket.

请十分仔细地查看他左边衣袖的里侧，还有他上衣大口袋里面的那几个小包。

youdao

Bring cash, but for safety reasons, divide large amounts of cash between family members and stow in safe areas, like money belts and inside pockets.

BBC: Cash-only for visitors to the Vatican