Abu Ishaq narrated from Ikrimah, from Ibn Abbas who said:“Abu Bakr [may Allah be pleased with him] said: ‘O Messenger of Allah! You have become gray.’ He said: ‘I have gone gray from (Surat) Hud, Al-Waqi`ah, Al-Mursalat and `Amma Yatasa'alun and Idhash-Shamsu Kuwwirat.’”
Opening the collection...
“Read in the name of your Lord who created.” 96:1
“My Lord, increase me in knowledge.” 20:114
“So remember Me; I will remember you.” 2:152
“Indeed, with hardship comes ease.” 94:6