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 Khomeini was found on rooftop reciting Ziarat Ashura

Extracted from a collection of memoirs about Imam Khomeini

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

A memoir by Hujjatal Islam Ashtiyani

Weather conditions could never prevent Imam from reciting Ziarat-e-Ashura on rooftop

A memoir by Imam’s domestic servant known as Jafar Mashhadi