Abu Abdallah al-Husayn ibn Ahmad al-Mughallis

Abū Abdallāh al-Ḥusayn ibn Aḥmad al-Mughallis al-Marāghī (; the epithet also appears as al-Mughallisī) was a tenth-century CE poet. He flourished around 381 AH/991 CE, being associated with the court of Bahāʾ al-Dawla. He is noted as one of the only known composers of Arabic riddles in the third century AH.
Epithets.
A few sources refer to Ibn al-Mughallis instead as al-Muflis ('the bankrupt'), but this is due to scribal confusion of the Arabic letters غ and ف: in medial position these look similar, and short vowels are not written, so that 'al-Mughallis' was miscopied as 'al-muflis'. "Mughallis" has been glossed to mean 'the one who tarries'.
The epithet "al-Marāghī" has been thought to suggest that al-Mughallis originated in the Adharbayjani town of Maragheh. 
Works.
According to Bilal Orfali, the eleventh-century literary scholar ʻAbd al-Malik ibn Muḥammad Thaʻālibī quotes from al-Mughallis's poetry in many of his works. His poetry anthology "Yatīma" includes al-Mughallis's work in 'the third region of the "Yatīma al-Dahr": on the clever curiosities of the inhabitants of Jibāl, Fārs, Jurjān, and Ṭabaristān' ()', specifically the eighth chapter, 'mention of all the poets of al-Jabal and those who went there from Iraq and other places, and the clever curiosities of their accounts and poems' (). The collection quotes two riddles, on a touchstone () and banner ().
Thaʻālibī included more of Orfali's poems in the sequel to the "Yatīma", his "Tatimma al-Yatīma", where al-Mughallis appears in the second region, entitled: 'completion of the second region on the beauties of the Iraqīs — rather, their best achievements and clever related curiosities' (). According to both the Beirut edition of 1983 and Radwan's critical edition of 1972, the "Tatimma" records nine riddles by al-Mughallis on the following themes: sufra (), egg (), preservation of a vegetable (), hornet (), scissors (), sword (), drainpipe (), book (), the image one sees in the mirror (), and the bath (), along with a brief excerpt from a "ghazal".