Luke 9:7

When Herod the tetrarch heard all that was going on, he was quite at a loss; for some said that John had risen from the dead,

Matthew 14:1-12

At that time Herod the tetrarch heard about the fame of Jesus.

Mark 6:14-28

Now this came to the hearing of king Herod, for the name of Jesus had become well known; people said, "John the Baptizer has risen from the dead, that is why miraculous powers are working through him;"

Luke 3:1

Now in the fifteenth year of the reign of Tiberius Caesar, when Pontius Pilate was governor of Judaea, Herod being tetrarch of Galilee, Philip his brother tetrarch of the country of Ituraea and Trachonitis, and Lysias tetrarch of Abilene,

Luke 9:19

They replied, "John the Baptist, though some say Elijah and some say that one of the ancient prophets has arisen."

Luke 21:25

And there will be signs in sun and moon and stars, while on earth the nations will be in dismay with bewilderment at the roar of sea and waves,

Treasury of Scripture Knowledge

Summary

Now Herod the tetrarch heard of all that was done by him: and he was perplexed, because that it was said of some, that John was risen from the dead;

General references

Bible References

He

Luke 21:25
And there will be signs in sun and moon and stars, while on earth the nations will be in dismay with bewilderment at the roar of sea and waves,

General references

John 3:24
(John had not yet been thrown into prison).