As-Salaam alaikum, Ayat 55 of Surat Ta-Ha of the Holy Qur'an reads:-- "We have created you from the earth (dust), and We will return you towards it once again." About this, Abdullahi Ibn Mas'ud, may Allah be pleased with him, reported an angel is appointed to the womb. He takes the nufta from the womb, keeps it on his hand and says:- "Ya Rabb, will he be allowed to be born (created) or not?" If Allah Ta'ala says that he will be born, then he (the angel) asks, "What is his sustenance, what is his athr and when is the time of his death?" Allah says: 'Observe it in Lauh-e-Mahfuz'. Then, the angel looks into Lauh-e-Mahfuz and he finds everything therein. He then takes the sand from the place where he will be buried and he mixes his Nutfa (a drop of liquid) with this sand. This is what the ayat quoted above refers to.