I heard Muhammad ibn Hamdoon say: 'I accompanied Abu Bakr ibn Ishaaq as-Sibghee for [many] years, and I never saw him leave the night prayer - not during travel, and nor when he wasn't [travelling].'
Category: Companions of the Prophet ﷺ
Maintaining the night prayer
I heard 'Abdullaah the son of 'Ali ibn Hamshaad say: 'I do not know that my father [ever] gave up [praying] the night prayer.'
Leading the night prayer
Suwayd ibn Ghafalah رحمه الله would lead us in the night prayer during the month of Ramadhaan, [even though] he had reached 120 years [of age].
Missed the 'ishaa prayer
Naafi' reports that if Ibn 'Umar رضي الله عنهما missed the 'ishaa prayer in congregation, he would remain awake the rest of the night standing in prayer.
Attaining the sweetness of worship
Having worshiped Allaah for 50 years, I had not found (experienced) the sweetness of worship until I left three things
From the etiquettes of differing with one another
I met our Shaykhs - Zirr and Abu Waa.il - and from them was he whom 'Uthmaan [ibn 'Affaan] was dearer to him than 'Ali [ibn Abi Taalib], and from them was he whom 'Ali was dearer to him than 'Uthmaan...
Avoid gatherings of backbiting and slander
When you have prayed, why do you not sit with us?
He would pinch his nose
Ayyoob as-Sikhtiyaanee was [humble and] tender hearted, and when he would become tearful in front of his companions, he would pinch his nose to give [them] the impression he had a cold, and if he...
Fasting every other day for the last sixty years
Regarding 'Ali ibn al-Ja'd [it was said that] for the last sixty years, he has been fasting every other day.
After he had read it only once
Regarding Abul-Ma'aadee Muhammad ibn 'Ali ibn Abil-'Ashaa.ir al-Halabee (died 789A.H.), it has been narrated that he memorised Soorah al-An'aam in his youth, after he had read it only once.