Romans 8:26:

Likewise the Spirit also helpeth our infirmities: for we know not what we should pray for as we ought: but the Spirit itself maketh intercession for us with groanings which cannot be uttered.

See also:

Objection: God Wouldn’t Heal Paul’s Thorn in the Flesh
Objection: Our Bodies Are Not Yet Redeemed, So We Are Still Subject to Sickness
Objection: Paul Said That the Entire Creation (Which Includes YOU) Groans and Travails in PAIN (Romans 8:22)