Reference: Siyar A’laam an-Nubalaa – Volume 17, Page 190
Abu Bakr al-Khateeb said:
The portion [of worship which] Ibn al-Baaqillaanee had set himself every night was 20 rak’ahs – [and this was] whilst he was at home and [also] whilst he was travelling; and when he was done, he would take to writing 35 pages of his book.
