Hadith 2319
Narrated Abdullah ibn Umar: The Prophet ﷺ said: The month consists of twenty-nine days, but do not fast till you sight it (the moon) and do not break your fast till you sight it. If the weather is cloudy, calculate it thirty days. When the twenty-ninth of Sha'ban came, Ibn Umar would send someone (who tried) to sight the moon for him. If it was sighted, then well and good; in case it was not sighted, and there was no cloud and dust before him (on the horizon), he would not keep fast the next day. If there appeared (on the horizon) before him cloud or dust, he would fast the following day. Ibn Umar would end his fasting alone with the people, and did not follow this calculation.
Hadith 4024
Narrated Umm Khalid, daughter of Saad bin al-As: Once the Messenger of Allah ﷺ was brought some garments among which was a small cloak with a border and black stripes. He said: Whom do you think to be more deserving for it ? The people kept silence. He said: Bring Umm Khalid. The she was carried to him and he put it on her, saying: Wear it out and make it ragged twice. Then he went on looking at red or yellow marks on it, and said: This is sanah, sanah, Umm Khalid. It means "beautiful" in the language of the Abyssinians.
Hadith 4144
Saeed ibn Amr al-Qurashi quoting his father said: Ibn Umar (once) saw some fellow travellers of the Yemen. They had their saddles (on camels) of leather. He said: If anyone likes to see the fellow travellers most resembling to the Companions of the Messenger of Allah ﷺ, he should see them.