In some ways this is one of the scariest verses in the Bible. While is doesn't mention provision directly, it certainly speaks to it. In this passage Jesus is giving some final instructions to His disciples about how they are going to do life without His physical presence. He challenges them to remain intimately connected to Him, and then makes this audacious claim.

If we remain in Him (stay intimately connected), and keep His words within us (stay closely connected to His teachings) then we can ask in prayer anything we want, and it will be done for us.

Hardly know what to do with that sentiment. And yet, it's a clear promise, albeit conditional on remaining intimately connected to Jesus. And "Anything you wish" seems to be a wide enough umbrella to include physical needs.

Both Matthew 21:22 & Mark 11:24 seem to carry the same tone.

Matthew 21:22, Mark 11:24 and John 15:7