Sahih al-Bukhari Book 65, Hadith 243
While I was in the company of the Prophet (ﷺ) on a farm and he was reclining on a palm leave stalk, some
Jews passed by. Some of them said to the others. "Ask him (the Prophet (ﷺ) about the spirit." Some of
them said, "What urges you to ask him about it" Others said, "(Don't) lest he should give you a reply
which you dislike." But they said, "Ask him." So they asked him about the Spirit. The Prophet (ﷺ) kept
quiet and did not give them any answer. I knew that he was being divinely inspired so I stayed at my
place. When the divine inspiration had been revealed, the Prophet (ﷺ) said. "They ask you (O,
Muhammad) concerning the Spirit, Say: "The spirit," its knowledge is with my Lord; and of
knowledge you (mankind) have been given only a Little." (17.85)
Allah's Messenger (ﷺ) entered Mecca (in the year of the Conquest) and there were three-hundred and sixty idols around the Ka`ba. He then started hitting them with a stick in his hand and say: 'Truth (i.e. Islam) has come and falsehood (disbelief) vanished. Truly falsehood (disbelief) is ever bound to vanish.' (17.81) 'Truth has come and falsehood (Iblis) can not create anything.' (34.49)
(regarding): 'Neither say your, prayer aloud, nor say it in a low tone.' (17.110) This Verse was revealed while Allah's Messenger (ﷺ) was hiding himself in Mecca. When he prayed with his companions, he used to raise his voice with the recitation of Qur'an, and if the pagans happened to hear him, they would abuse the Qur'an, the One who revealed it and the one who brought it. Therefore Allah said to His Prophet : 'Neither say your prayer aloud.' (17.110) i.e. do not recite aloud lest the pagans should hear you, but follow a way between.