Mark 16:18

they will take up serpents; and, if they drink any deadly thing, it will not hurt them; they will lay hands on the sick, and they will recover."

Luke 10:19

Behold, I have given you the authority to tread upon serpents and scorpions, and over all the power of the enemy; and nothing shall in any wise harm you.

Acts 28:3-6

And Paul, having gathered a certain lot of fuel, and put it on the fire, a viper, coming out from the heat, fastened upon his hand.

Romans 3:13

their throat is an open sepulchre; with their tongues they used deceit; the poison of asps is under their lips;

Romans 16:20

And the God of peace shall bruise Satan under your feet speedily. The grace of our Lord Jesus Christ be with you.

2 Timothy 4:17

The Lord stood by me, and strengthened me, that through me the proclamation might be fully announced, and that all the gentiles might hear; and I was delivered out of the mouth of a lion.

Revelation 12:9

And the great dragon was cast down, the old serpent, he that is called the Devil and Satan, who deceives the whole habitable earth; he was cast down to the earth, and his angels were cast down with him.

Revelation 20:1-2

And I saw an angel coming down out of Heaven, having the key of the abyss, and a great chain upon his hand.

Treasury of Scripture Knowledge

Summary

Thou shalt tread upon the lion and adder: the young lion and the dragon shalt thou trample under feet.

Bible References

Adder

Mark 16:18
they will take up serpents; and, if they drink any deadly thing, it will not hurt them; they will lay hands on the sick, and they will recover."
Acts 28:3
And Paul, having gathered a certain lot of fuel, and put it on the fire, a viper, coming out from the heat, fastened upon his hand.
Romans 3:13
their throat is an open sepulchre; with their tongues they used deceit; the poison of asps is under their lips;
Romans 16:20
And the God of peace shall bruise Satan under your feet speedily. The grace of our Lord Jesus Christ be with you.

The dragon

Revelation 12:9
And the great dragon was cast down, the old serpent, he that is called the Devil and Satan, who deceives the whole habitable earth; he was cast down to the earth, and his angels were cast down with him.
Revelation 20:1
And I saw an angel coming down out of Heaven, having the key of the abyss, and a great chain upon his hand.