Standing while saying takbīrat al‑iḥrām and standing before rukūʿ – which is called ‘the standing that is connected to the rukūʿ’ (al‑qiyām al‑muttaṣil bil‑rukūʿ) – is a rukn. However, standing while reciting Sūrat al-Ḥamd and the other surah, and standing after rukūʿ, are not rukns; and if one omits these forgetfully, his prayer is valid.