Musnad Abi Ya'la 749 — when his father (Sayyiduna Sa'd, may Allah be)

Amir bin Sa'd bin Abi Waqqas (may Allah have mercy on him) narrates that when his father (Sayyiduna Sa'd, may Allah be pleased with him) saw the disagreement among the Companions of the Messenger of Allah (peace and blessings be upon him) and their division, he bought some livestock for himself, then went out and settled apart with his family at a watering place called "Qalahhi". Sayyiduna Sa'd (may Allah be pleased with him) had the sharpest sight of all people. One day he saw something moving and said to his companions: "Do you see anything?" They said: "We see something like a bird." He said: "I see a rider on a camel." A little later (his son) Umar bin Sa'd arrived on a Bactrian camel (or she-camel), and Sayyiduna Sa'd (may Allah be pleased with him) said: 'Allahumma inna na'udhu bika min sharri ma ja'a bih' (O Allah, we seek Your refuge from the evil of what he has brought). Umar gave the greeting of peace, then said to his father: "Are you content to follow the tails of this livestock among these mountains while your companions are disputing over the leadership of the Ummah?" Sayyiduna Sa'd bin Abi Waqqas (may Allah be pleased with him) said: "I heard the Messenger of Allah (peace and blessings be upon him) say: 'After me there will soon be trials (or he said: affairs); the best of people in them will be the one who is self-sufficient, inconspicuous and God-fearing.' So, my son, if you can be like that, then be so." Umar said: "Have you nothing other than this?" He said: "No, my son." So Umar sprang up to mount, and he had not yet even unloaded his camel. Sayyiduna Sa'd (may Allah be pleased with him) said: "Wait, let us give you something to eat." He said: "I have no need of your food." He said: "Then let us milk (an animal) and give you a drink." He said: "I have no need of your drink." Then he mounted and went back from that very spot.