Abu Basir narrated from Imam Jafar ibn Muhammad Al-Sadiq عليه السلامregarding a man who forgets to wipe his head during wudu. Imam عليه السلام said: "Then let him wipe it." Abu Basir asked: "What if he does not remember until he has started the prayer?" Imam عليه السلام said: "Then let him wipe his head with the moisture from his beard”.
