Jami` at-Tirmidhi Book 48, Hadith 240
“Indeed, having good thoughts concerning Allah is from the perfection of the worship of Allah.”
“There is not a worshipper who raises his hands, such that his armpit becomes visible, asking Allah for something, except that He shall grant it to him - as long as he does not become hasty.” They said: “O Messenger of Allah, and how is haste made concerning it?” He (ﷺ) said: “He says: ‘I did ask and ask, and I was not given a thing.’”
“The Messenger of Allah (ﷺ) said: ‘Let one of you look at what it is that he wishes for. For verily, he does not know what of his wish shall be recorded.’”