I don't have a written source for you, just a maaseh that I personally somehow merited experiencing.

The first few years I started doing teshuva, I was living in a remote location in a third world country with a very small Jewish population. If I wanted kosher wine, I had to order it by the case from an importer in the country's capital, and it would take about a week to arrive.

One Sunday I noticed that I was down to my last bottle of wine. This was particularly problematic because due to the business I was running, I had accounts recieveable due in 30 days, but just enough to make payroll in the bank, and the wine had to be paid for in cash.

I read that passuk somewhere in my limmud that week (by "coincidence" of course), and decided to put HKBH to the test (remember, this and maaser are the two ways we are permitted to test Him). I borrowed the amount needed (it came to something like US$ 186 at the then-current exchange rate) and ordered the wine.

Two days later a client called me up and needed a small job done, and wouldn't you know that when we calculated how much it would cost, it came to....that exact same amount, $186. He then proposed to settle up right away. בה, message recieved!

This differs from the standard h.p. concerning our parnassah in that, as the gemarrah explains (I don't remember where), our income for the year is determined during the Yomim Noraim, but our spending for Shabbat and Yom Tov is outside of that. Meaning, if I was "supposed" to make $100,000 that year, the $186 I spent on wine was additional to that, pushing me up yo $100,186.

I don't have a written source for you, just a maaseh that I personally somehow merited experiencing.

The first few years I started doing teshuva, I was living in a remote location in a third world country with a very small Jewish population. If I wanted kosher wine, I had to order it by the case from an importer in the country's capital, and it would take about a week to arrive.

One Sunday I noticed that I was down to my last bottle of wine. This was particularly problematic because due to the business I was running, I had accounts recieveable due in 30 days, but just enough to make payroll in the bank, and the wine had to be paid for in cash.

I read that passuk somewhere in my limmud that week (by "coincidence" of course), and decided to put HKBH to the test (remember, this and maaser are the two ways we are permitted to test Him). I borrowed the amount needed (it came to something like US$ 186 at the then-current exchange rate) and ordered the wine.

Two days later a client called me up and needed a small job done, and wouldn't you know that when we calculated how much it would cost, it came to....that exact same amount, $186. He then proposed to settle up right away. בה, message recieved!

This differs from the standard h.p. concerning our parnassah in that, as the gemarrah explains (I don't remember where), our income for the year is determined during the Yomim Noraim, but our spending for Shabbat and Yom Tov is outside of that. Meaning, if I was "supposed" to make $100,000 that year, the $186 I spent on wine was additional to that, pushing me up to $100,186.