Wani nau'in aiki kuma shi ne cire abin da ke cikin ƙasa wanda ba ɗaya ne daga cikin abubuwan da al'umma ke buƙata ba, watau taskar da aka ɓoye (Rikaz). Wannan ba haƙƙi ne na Musulmi baki ɗaya ba, kamar yadda aka bayyana a cikin ƙamus na fiqhu. Wanda ya cire taska yana mallakar huɗu cikin biyar na ita, sannan ya ba da ɗaya cikin biyar a matsayin Zakka.

Another type of work is extracting that which exists inside the earth and which is not one of the necessities of the community, namely the hidden treasure (Rikaz). This is not a right for Muslims collectively, as is stated in Fiqh terminology. The one who extracts a treasure possesses four-fifths of it and gives the other fifth as Zakat.

Amma idan abu ya kasance daga cikin bukatun al'umma da hakkin Musulmi baki daya, to yana cikin dukiyar jama'a. Abin da ke tantance wannan al'amari a fili shi ne: idan dukiyar an boye ta a cikin kasa ta hannun mutum, ko kuma ta yi karanci ta yadda ba ta zama bukata ga al'umma ba, to za ta zama dukiyar boye (Rikaz). Amma abin da yake a asali cikin kasa kuma al'umma tana bukatarsa, ba Rikaz ba ne, sai dai dukiyar jama'a ce. Abin da yake a asali cikin kasa kuma al'umma ba ta da bukatarsa, kamar ma'adanan duwatsu da ake fitar da duwatsun gini da sauran irin haka daga cikinsu, ba Rikaz ba ne kuma ba dukiyar jama'a ba ce, a maimakon haka yana cikin mallakar mutum daya. Shaidar mallakar Rikaz da bayar da kashi daya cikin biyar na shi a matsayin zakka tana cikin hadisin da 'Amr dan Shu'aib ya ruwaito a cikin al-Nasa'i daga mahaifinsa, daga kakansa, wanda ya ce: "An tambayi Manzon Allah ﷺ game da Luqatah (abin da aka dauka daga kasa), sai ya ce: 'Idan an dauke shi daga hanyar da ake amfani da ita ko daga kauyen da mutane ke zaune, to ka siffanta shi kuma ka sanar da shi tsawon shekara guda: idan mai shi ya bayyana ya tabbatar da shi, sai a mayar masa, in ba haka ba kuma naka ne. Amma idan ba a dauke shi daga hanyar da ake amfani da ita ba ko daga kauyen da mutane ke zaune, to sai ka biya kashi daya cikin biyar na shi da na Rikaz.'" Fitar da abin da yake cikin iska, kamar iskar oxygen da nitrogen, ana daukarsa kamar abin da ake samarwa daga cikin kasa. Duk abin da Allah (SWT) ya halitta wanda Shari'a ta halatta amfani da shi kuma ba ta takaita amfani da shi ba, ana daukarsa haka nan.