Sayyiduna ‘Umar Farooq-e-A’zam رَضِىَ اللهُ تَعَالٰی عَـنْهُ used to say, ‘Remember Hell abundantly since it is extremely hot and very deep and its hammers are made up of iron (with which the sinners will be struck). (Sunan-ut-Tirmizi, vol. 4, pp. 260, Hadees 2584)
Once, Sayyiduna ‘Umar Farooq-e-A’zam رَضِىَ اللهُ تَعَالٰی عَـنْهُ fell ill, the physicians prescribed honey for treatment. The honey was available in the treasury but he رَضِىَ اللهُ تَعَالٰی عَـنْهُ was not willing to take it without the prior permission of the Muslims. Hence, he رَضِىَ اللهُ تَعَالٰی عَـنْهُ visited the main Masjid and gathered the maximum number of Muslims to seek their permission. When people allowed, then he رَضِىَ اللهُ تَعَالٰی عَـنْهُ used it.
(At-Tabqat Ibn Sa’d, vol. 3, pp. 209)
Sayyiduna Ibn ‘Umar رَضِیَ الـلّٰـهُ تَعَالٰی عَـنْهُمَا has said that Sayyiduna ‘Umar Farooq-e-A’zam رَضِىَ اللهُ تَعَالٰی عَـنْهُ observed fasts continuously for two years before his demise.
According to another narration: Except for Eid-ul-Adha, Eid-ul-Fitr and when travelling, Sayyiduna ‘Umar Farooq-e-A’zam رَضِىَ اللهُ تَعَالٰی عَـنْهُ used to observe fasts on a regular basis.
(Manaqib ‘Umar Bin Al-Khattab li Ibn Al-Jawzi, pp. 160)