Ali (AS) used to seek God's forgiveness seventy times in the last part of every night, following the two rak'ahs of the dawn [supererogatory] prayer. (al-Balad al-Amin, vol. 1, p. 38)
The Commander of the Faithful (AS) held himself bound to seek forgiveness seventy times in the hours before dawn, and he would ordinarily perform this seeking of forgiveness immediately after the supererogatory prayer of the morning.
Al-Shahid (may God have mercy on him) mentioned in al-Risala al-Taklifiyya that Ali (AS) said: Whoever prays a tenth of the night sincerely, seeking God's good pleasure, God says to His angels: Write for this servant of Mine good deeds to the number of every grain, leaf and tree that has grown along the Nile. (al-Balad al-Amin, vol. 1, p. 147)
The Commander of the Faithful (AS) said: Whoever worships for one tenth of the night sincerely, with the aim of gaining his Lord's regard, draws down God's merciful regard, and He says to the angels: For every plant and seed and leaf that has grown in existence tonight, bestow a good deed upon My servant.
'al-Misbah' is another book of al-Kaf'ami which, although its original title is Junnat al-Aman al-Waqiya, has come to be called Misbah al-Kaf'ami because of its resemblance to the Misbah al-Mutahajjid of Shaykh al-Tusi. The subject of this book too is devotional acts, supplications and visitations. After this book was written, Shaykh al-Tusi's Misbah in practice fell out of favour; and after Mafatih al-Jinan was written, al-Kaf'ami's Misbah fell out of favour. That is to say, for centuries al-Kaf'ami's Misbah was the 'Mafatih' of the Shi'i household.