Talk

I would report it.

threatening behaviour.

Absolutely report is, phone 101.

Definitely report it. Be sure they see all the texts etc. hope all goes ok x

Report it and keep a copy of your text msg.bHe needs to know you will protect yourself and yor family and DC from his threats and behaviour

Report it. Now.

Report it to the police.

You should never ignore a threat to kill you.

Chances are he is just (just I say, like it's a small thing!) trying to intimidate you and would never actually act on it but women are killed by current and ex partners and it is important that you report this. He cannot be allowed to think it is ok to say this to you.

You have proof of his threats (you still have the text ?)
REPORT.
When they say that - why would you think he wouldn't mean it ?
My ex threatened - only verbally, no witnesses (and before mobiles, social media etc) and he tried on so many occasions to beat me to death, or drive me to kill myself.
Please, please, please report.

Definitely report it. And keep the text to show the police.

Chances are he wouldn't follow it through, but he needs to know that sort of threat is unacceptable.

Report him and stay safe.

Definitely report to police. I would then set up an email account just for him, change your number and inform him that due to his threatening behaviour contact from now on will be via email only.
That way you don't have to speak to him at all and any further threats can be kept and shown to the police.

Police. Immediately.