Why did Imam Khomeini not encourage his grandson to perform midnight prayers?

Imam's quiet companion and pleasant companionship

Seyyed Ahmad Khomeini loved playing football, Imam never prevented him

Extracted from the book “practical conduct and behavior of Imam Khomeini”

Imam introduced and promoted deep insightfulness and various disciplines of knowledge at seminaries

Ahmad Khomeini had great virtues, sacrificed himself for Imam

Source: Ambassador of the Imam and the Revolution (Memoirs of Hojjat al-Islam and Muslims Seyyed Ali Akbar Mohtashamipour)

Imam passed night in complete tranquility even during military rule by Shah regime remnants.

A memoir by Hujjatal Islam Ashtiyani

Imam regularly kept reciting Ziarat-e- Ashura even during exile in Nofel Loshato

A memoir by late Hojjat al-Ismail Ferdousipour

Leave me alone during Ramadan, Imam Khomeini told his fellow clerics and clergies

A memoirs by Hojjat al-Islam Mohammd Sarouh Mahallati