Narrated It was narrated that ‘Abdullah, the freed slave of Asma’ bint Abi Bakr, said:
Asma’ sent me to 'Abdullah bin 'Umar, and she said: I have heard that you regard three things as haram: borders on garments, saddle cloths made of bright red cloth, and fasting the whole of Rajab. 'Abdullah said to me: As for what you have mentioned about Rajab, what about one who fasts continually? As for what you said about borders on garments, I heard 'Umar bin al-Khattab say: I heard the Messenger of Allah ﷺ say: “Whoever wears silk in this world will not wear it in the Hereafter.`
We were with 'Umar between Makkah and Madinah, and we looked for the new crescent moon. I was sharp sighted and I saw it, and I started saying to ‘Umar, Don't you see it? He said: I will see it when I am lying in my bed. Then he started telling us about the people of Badr. He said: the Messenger of Allah ﷺ was showing us the places where they would fall (in battle), saying: “This is where So and so will fall in battle tomorrow, if Allah wills; this is where So and so will fall in battle tomorrow, if Allah wills.” And they started to fall in those places, I said: By the One who sent you with the truth, they did not miss those places; they fell in those places. Then he ordered that they be thrown into a well, and he went to them and said: `O So and so, O So and so, did you find what Allah promised you to be true? For I found what Allah promised me to be true.` 'Umar said: O Messenger of Allah (ﷺ) , are you speaking to people who are now dead? He said: `You do not hear what I am saying any better than they do, but they cannot answer.`
Narrated It was narrated that Ma'dan bin Abi Talhah said:
'Umar said: I never asked the Messenger of Allah ﷺ about anything more than I asked him about kalalah, until he poked me in the chest with his finger and said: `Is not ayatus-saif (the verse of summer, i.e., it was revealed in summer), which appears at the end of Sooratan-Nisa', sufficient for you?”
