This is very sad

Leviticus 10:1-3

1 Aaron's sons Nadab and Abihu took their censers, put fire in them and added incense; and they offered unauthorized fire before the LORD, contrary to his command. 2 So fire came out from the presence of the LORD and consumed them, and they died before the LORD.

2 Samuel 6:5-7

5 David and the whole house of Israel were celebrating with all their might before the LORD, with songs and with harps, lyres, tambourines, sistrums and cymbals.

6 When they came to the threshing floor of Nacon, Uzzah reached out and took hold of the ark of God, because the oxen stumbled. 7 The LORD's anger burned against Uzzah because of his irreverent act; therefore God struck him down and he died there beside the ark of God.

John 4:23-24

23Yet a time is coming and has now come when the true worshipers will worship the Father in spirit and truth, for they are the kind of worshipers the Father seeks. 24God is spirit, and his worshipers must worship in spirit and in truth."

1 Peter 1:16
"Be Holy for I am Holy"