It is reported from Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) concerning this story that the father of those (women) (Shu'ayb, may Allah have mercy on him) asked: "How do you know of his strength and his trustworthiness?" She said: "As for his strength, he lifted by himself the stone that only ten men could lift; and as for his trustworthiness, it is his saying: 'Walk behind me and describe the way to me,' so that the wind would not reveal your body to me."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب المساقاة / 11635