وَ وَضَعْنَا عَنۡکَ وِزْرَکَ ۙ﴿۲﴾

And relieve you of the burden –

Tafsir al-Matureedi                                           تفسیر الماتریدی                                

الوزر هو الحمل والثقل؛ كأنه يقول: قد خففنا عليك ما حمل عليك من أمر النبوة والرسالة

Al-Wizr mean burden and weight; as if the Almighty is saying, “We have made your burden of Prophethood and its duties lighter upon you.”

أي: عصمك وحفظك

i.e. Allah Almighty safeguarded you and protected you against sins.

Tafsir al-Matureedi (Taweel Ahl al-Sunnah) of Imam Abu Mansoor Muhammad Ibn Muhammad al-Matureedi t D. 333 A.H.