Likewise the Spirit also helpeth our infirmities: for we know not what we should pray for as we ought: but the Spirit Himself maketh intercession for us with groanings which cannot be uttered. – Romans 8:26

If I cannot find words in which to utter my desires, God in His grace will read my desires without the words. He takes the meaning of His saints, the meaning of their groans. A throne that was not gracious would not trouble itself to make out our petitions; but God, the infinitely gracious One, will dive into the soul of our desires, and He will read there what we cannot speak with the tongue. Have you never seen the parent, when his child is trying to say something to him, and he knows very well what it is the little one has got to say, help him over the words and utter the syllables for him, and if the little one has half-forgotten what he would say, you have seen the father suggest the word: and so the ever-blessed Spirit, from the throne of grace, will help us and teach us words, nay, write in our hearts the desires themselves. We have in Scripture instances where God puts words into sinners’ mouths. “Take with you words,” saith He, “and say unto Him, Receive us graciously and love us freely.” He will put the desires, and put the expression of those desires into your spirit by His grace; He will direct your desires to the things which you ought to seek for; He will teach you your wants, though as yet you know them not; He will suggest to you His promises that you may be able to plead them; He will, in fact, be Alpha and Omega to your prayer, just as He is to your salvation; for as salvation is from first to last of grace, so the sinner’s approach to the throne of grace is of grace from first to last. What comfort is this. Will we not, my dear friends, with the greater boldness draw near to His throne, as we suck out the sweet meaning of this precious word, “the throne of grace”?~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1024.cfm