Meaning of ‘Sleep on’ Phrasal Verb in English

We will sleep on the proposal to make a decision.

Let's sleep on the idea and discuss it at the meeting next week.

Instead of making a quick decision, it's better to sleep on the matter.

It's a significant purchase; I want to sleep on whether to buy it or not.

After the argument, they agreed to sleep on the issue and talk about it in the morning.

I need to think about this job offer, so I will sleep on it and give you my answer tomorrow.