Mark 1:15

13 And he was there in the wilderness forty days, tempted of Satan; and was with the wild beasts; and the angels ministered unto him.

14 Now after that John was put in prison, Jesus came into Galilee, preaching the gospel of the kingdom of God,

And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel.

16 Now as he walked by the sea of Galilee, he saw Simon and Andrew his brother casting a net into the sea: for they were fishers.

17 And Jesus said unto them, Come ye after me, and I will make you to become fishers of men.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
“The time is fulfilled,” He said, “and the kingdom of God is near. Repent and believe in the gospel!”
KJV
And saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe the gospel.
WEB
and saying, “The time is fulfilled, and God’s Kingdom is at hand! Repent, and believe in the Good News.”
ASV
and saying, The time is fulfilled, and the kingdom of God is at hand: repent ye, and believe in the gospel.
DARBY
and saying, The time is fulfilled and the kingdom of God has drawn nigh; repent and believe in the glad tidings.
BLB
and saying, “The time has been fulfilled, and the kingdom of God has drawn near. Repent and believe in the gospel!”
ÅB
og sa: Tiden er fullkommet, og Guds rike er kommet nær; omvend dere, og tro på evangeliet!
OTB
“Tiden er inne,” sa han. “Guds rike er nær. Omvend dere og tro på evangeliet!”
B1930
og sa: Tiden er fullkommet, og Guds rike er kommet nær; omvend eder, og tro på evangeliet!

Study notes (Tyndale)

Original text and word study

Cross references