Amazon will give you $10 if you’re a Prime member and go shopping at Whole Foods starting Wednesday, one of the many deals it's offering in the lead up to its Prime Day sale, which starts Monday.

There had been much speculation about what deals Amazon would offer at its newly-acquired supermarket chain to tie it into the company's annual sale for Prime members. This is Amazon’s fourth Prime Day sale, and the first since it closed the acquisition of Whole Foods last year.

Tuesday morning Amazon announced that Prime members who spend at least $10 at a Whole Foods supermarket between July 11 and 17 will get a $10 credit that will be applied to their Amazon account and can be used during the sale.

The discount seems aimed at getting more crossover between the two groups of shoppers. Morgan Stanley estimates that 60 percent of people who shop at Whole Foods are Prime members.

However a CNBC investigation found that fewer than 20 percent of Prime members shop at Whole Foods.

Amazon has multiple lures for Prime members to use Whole Foods around Prime Day. For customers who have never tried the store’s delivery service it's offering $10 off Prime Now grocery delivery from Whole Foods before July 17 as well as $10 to use towards a future order. That’s in addition to a range of sales on grocery items including strawberries, chicken and Icelandic cod.

It will also offer deep discounts on Alexa-enabled products such as Echo and Fire TV in the stores,

That's exactly the tactic Keith Anderson, vice president of strategy for Profitero, a London-based e-commerce analytics firm, had theorized Amazon might use.