'Demonstrations' in the Bible

When they came to the threshing floor of Atad, which is beyond the Jordan, they mourned there with a great lamentation (expressions of mourning for the deceased) and [extreme demonstrations of] sorrow [according to Egyptian custom]; and Joseph observed a seven-day mourning for his father.

"You are not to fear other gods, bow down to them, serve them, or sacrifice to them. Instead, it is to be the LORD, who brought you up from the land of Egypt, showing great power and public demonstrations of might, whom you are to fear, worship, and to whom you are to offer sacrifice.

To these [men] He also showed Himself alive after His suffering [in Gethsemane and on the cross], by [a series of] many infallible proofs and unquestionable demonstrations, appearing to them over a period of forty days and talking to them about the things concerning the kingdom of God.