And the Lord said unto him, Arise, and go into the street which is called Straight, and enquire in the house of Judas for one called Saul, of Tarsus: for, behold, he prayeth,

Poor Saul had been led to cry for mercy, and the moment he began to pray, God began to hear. Do you not notice, in reading the chapter, what attention God paid to Saul? He knew the street where he lived; “Go to the street that is called Straight.” He knew the house where he resided; “inquire at the house of Judas.” He knew his name; it was Saul. He knew the place where he came from; “Inquire for Saul of Tarsus.” And He knew that he had prayed. “Behold, he prayeth.” Oh! It is a glorious fact, that prayers are noticed in heaven. The poor broken-hearted sinner, climbing up to his chamber, bends his knee, but can only utter his wailing in the language of sighs and tears. Lo! That groan has made all the harps of heaven thrill with music; that tear has been caught by God, and put into the lachrymatory of heaven, to be perpetually preserved. The supplicant, whose fears prevent his words, will be well understood by the Most High. He may only shed one hasty tear; but “prayer is the falling of a tear.” Tears are the diamonds of heaven; sighs are a part of the music of Jehovah’s throne; for though prayers be

“The simplest form of speech
That infant lips can try;”

so are they likewise the

“Sublimest strains that reach The Majesty on high.”

~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0016.cfm