Does Oral torah claim gemilat chassidim (kind deeds) knegged kulam (worth all other commandments combined)?

I’m a fan of author rabbi slifkin. He makes the claim in the title. Can someone help me verify that and track down the original source:

Slifkin’s claim here: https://www.rationalistjudaism.com/p/kneged-kulam Which is backed up by this defunct link: http://www.shaalvim.co.il/torah/maayan-article.asp?backto=&ed=%E2%EC%E9%E5%EF%20%F0%E9%F1%EF%20%FA%F9%F2%E2%20&id=720