Qur'an (ash-Shu'ara', the Poets) 26:83

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"O my Lord! Make me perfect in knowledge and conduct and include me among those whom You have rewarded with Your nearness." - Qur’ān (ash-Shu‘arā’, the Poets) 26:83   [Where Hazrat Ibrāhīm(عليه السلام) is praying to Allah - Src: Ch3 of Beseeching for Help, Tahir-ul-Qadri]

Narrated by Ubayy ibn Ka'b (Radi Allah Ta'lah Anhu): "I said: Allah's Messenger (Sal-allahu-aleihi-wasallam), I invoke blessings upon you very frequently. How much of my supplication should I devote to you. He said: As much as you like. I said: May it be a quarter? He said: As much as you like, but if you increase it, it will be good for you. I said: May it be a half? He said: As much as you like, but if you increase it, it will be good for you. I said: May it be two thirds? He said: As much as you like but if you make an increase in it, it will be better. I said: May I devote the whole of my supplication to you (that I make in my prayer)? Thereupon he said: In that case it will take care of you and your sins would be expiated."

Tirmidhi transmitted it. Hadith No. 929 of Mishkat al-Masabih. [src: road-to-heaven.com]