Mark 11:26

²⁴ Therefore I say unto you, What things soever ye desire, when ye pray, believe that ye receive them, and ye shall have them.

²⁵ And when ye stand praying, forgive, if ye have ought against any: that your Father also which is in heaven may forgive you your trespasses.

But if ye do not forgive, neither will your Father which is in heaven forgive your trespasses.

²⁷ And they come again to Jerusalem: and as he was walking in the temple, there come to him the chief priests, and the scribes, and the elders,

²⁸ And say unto him, By what authority doest thou these things? and who gave thee this authority to do these things?

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

Compare

KJV: But if ye do not forgive, neither will your Father which is in heaven forgive your trespasses.
WEB: But if you do not forgive, neither will your Father in heaven forgive your transgressions.”
ASV: [But if ye do not forgive, neither will your Father who is in heaven forgive your trespasses.]
DARBY: But if *ye* do not forgive, neither will your Father who is in the heavens forgive your offences.

ÅB: Men dersom dere ikke tilgir, da skal heller ikke deres Far i himmelen tilgi deres overtredelser.
OTB: [Men hvis dere ikke tilgir, vil heller ikke deres Far i himmelen tilgi deres synder.”]
B1930: Men dersom I ikke forlater, da skal heller ikke eders Fader i himmelen forlate eders overtredelser.