Hebrews 3:15

¹³ But exhort one another daily, while it is called To day; lest any of you be hardened through the deceitfulness of sin.

¹⁴ For we are made partakers of Christ, if we hold the beginning of our confidence stedfast unto the end;

While it is said, To day if ye will hear his voice, harden not your hearts, as in the provocation.

¹⁶ For some, when they had heard, did provoke: howbeit not all that came out of Egypt by Moses.

¹⁷ But with whom was he grieved forty years? was it not with them that had sinned, whose carcases fell in the wilderness?

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

Compare

BSB: As it has been said: “Today, if you hear His voice, do not harden your hearts, as you did in the rebellion.”
KJV: While it is said, To day if ye will hear his voice, harden not your hearts, as in the provocation.
WEB: while it is said, “Today if you will hear his voice, don’t harden your hearts, as in the rebellion.”
ASV: while it is said, To-day if ye shall hear his voice, Harden not your hearts, as in the provocation.
DARBY: in that it is said, To-day if ye will hear his voice, do not harden your hearts, as in the provocation;
BLB: As it is said: “Today if you⁺ should hear His voice, do not harden your⁺ hearts, as in the rebellion.”

ÅB: Når det sies: Idag, om dere hører hans røst, da forherd ikke deres hjerter som ved forbitrelsen,
OTB: Som det har blitt sagt:
“I dag, hvis dere hører hans røst,
gjør ikke hjertene harde som under opprøret.”
B1930: Når det sies: Idag, om I hører hans røst, da forherd ikke eders hjerter som ved forbitrelsen,

Hebrews 3:7–8
Wherefore (as the Holy Ghost saith, To day if ye will hear his voice,
Read in context
Psalms 95:7
For he is our God; and we are the people of his pasture, and the sheep of his hand. To day if ye will hear his voice,
Read in context
Hebrews 10:38
Now the just shall live by faith: but if any man draw back, my soul shall have no pleasure in him.
Read in context
Hebrews 10:29
Of how much sorer punishment, suppose ye, shall he be thought worthy, who hath trodden under foot the Son of God, and hath counted the blood of the covenant, wherewith he was sanctified, an unholy thing, and hath done despite unto the Spirit of grace?
Read in context