Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 3 years ago
Main changes in Salaah were done during the rule of Omar ibn Al-Khattab. There are hundreds of narrations even in Sunni books about these changes initiated by Omar. You can see Al-Nass WAL-Ijtihad by Allama Sharafuddin and also Kitab Al-Waa'il which is a Sunni book by Abu 'Oroobah, stating who initiated what among Muslims.
Wassalam.