Mawlana Mohammad Kaleem Siddiqui (Allah preserve him) said,

‘Sheikh al-Hadith Mawlana Zakariya (Allah have mercy on him) said in regards to ijazat (permission to take murid), that it is a certification to practice medicine. It is not a certificate of (your own) health. Hence, treat yourself and also others.’

Monthly Armugan, June 2010, page 31