Abu Bakr said:
‘O Messenger of Allah (ﷺ)! You have become gray.’
He (ﷺ) said: ‘I have gone gray from
1) (Surat) Hoodh,
2) (Surat) Al-Waqi`ah,
3) (Surat) Al-Mursalat and
4) (Surat An Naba) Amma Yatasa'alun and
5) (Surat At Takweer) Idhash-Shamsu Kuwwirat.’