The phrase "a generous source of" is correct and usable in written English.
It can be used to describe something that provides a large amount of a particular resource or benefit.
Example: "The library is a generous source of information for students conducting research."
Alternatives: "an abundant source of" or "a rich source of".
All three spoke fondly of "Max" as an inspiration and a generous source of encouragement.
She was a brilliant legal counselor and litigation strategist, and a generous source of advice and support for her family, friends and colleagues.
His act mainly targets current events and the local political scene – which, believe me, is quite a generous source of comedic material.
Although the climate adds a layer of difficulty to daily life, the land is a generous source of crops and materials, including vast reserves of oil, gas, and precious metals.
In 1995 the Foundation acted as a generous source of funding for the Senior Assistance Veterinary Effort (SAVE), providing medical care to the companion animals of indigent elderly persons.
And eventually it led to a guest slot – as the seasoned old pro, a generous source of advice and tears; someone, incredibly, edging towards classiness – on Any Dream Will Do and I'll Do Anything.
It has three generous sources of income: an airport tax, a 1% levy on hotel beds and money from a fund set up by big business to fight unemployment.
Throughout the postwar period the Italian state expanded into so many areas of industry, running some of the largest monopolies in Europe and proving itself one of the most generous sources of pensions and handouts in the whole world.
Amphibian skin, such as skin of the Odorrana grahami where 107 novel AMPs were discovered [ 3], is one of the most generous sources of AMPs.
The state has been seen as a protector, and as generous, a source of riches that should be taken advantage of.
Sally was a generous and unfailing source of strength for her entire family, and all who knew her.
