مناسك حج - مكارم شيرازى، ناصر - الصفحة ١١٠ - Atonements of Ihram
Fourth: is circumcision.
Article ١٨٥- Tawaf of uncircumcised man is not correct and obligatory precaution is that children to be also circumcised for performing Tawaf.
Article ١٨٦- Whenever a person performs Tawaf without circumcision deliberately or because of ignorance or forgetfulness, then his Tawaf is invalidated.
Article ١٨٧- Whenever an adult has not been circumcised and gains the ability of performing Hajj( like people who has newly became Muslim ), should performs Hajj in that year if he can circumcise, and if he cannot do it then he should delays Hajj until he is circumcised, and if circumcision is harmful for him forever then he should perform Hajj in that condition) but it is Mustahab precaution to take a proxy for performing Tawaf in behalf of him adding to his own Tawaf (.