Answered by Shaykh Faraz Rabbani
Brother Yusuf Mullan said:
Walaikum assalam wa rahmatullah,
What Mufti Yusuf Mullan explained is absolutely sound.
Imam Tumurtashi stated in Tanwir al-Absar [kitab al-zakat’]
“The condition is for the zakatable amount (nisab) to be found at the beginning and end of the zakat year (hawl).”
Thus, the commentators explain, at the end of the zakat period, one pays zakat on one’s entire zakatable wealth, regardless of when it was acquired.
Ibn Abidin points out something important in his Sharh Uqud Rasm al-Mufti:
“Understanding evidences (dalil) is only (truly) possible for someone at the level of ijtihad (mujtahid), for it depends on knowing that the evidence is free of that which opposes it, which depends on having complete awareness of the primary sources, which is not possible for other than a mujtahid.
As for merely knowing that a given mujtahid took a given ruling from a given set of evidences, it is of little ultimate consequence…” (Sharh Uqud Rasm al-Mufti, in Rasa’il Ibn Abidin, 1: 30)
And Allah alone gives success.
Wassalam,
Faraz Rabbani