The answer is as follows: this is not the point under discussion, for this sitting is called the jalsat al-istirāḥah (the sitting of rest). When a person braces himself on the ground to rise from that sitting, he relies on his hands while they are level with his sides, not out in front of him; therefore he bears no resemblance to a camel when it rises.

Al-ʿAynī, in his commentary on al-Bukhārī, wrote: “It clarifies the manner: he first sits, then leans, then rises. The jurists said that he should lean the way a dough-kneader leans over the dough.”

I say: This is done by those for whom rising quickly is difficult—such as the elderly, the infirm, and the like. It has been narrated that the Prophet ﷺ did so when he had grown heavier, that is, when he had put on flesh.

Al-Ḥāfiẓ Ibn Ḥajar, in Fatḥ al-Bārī, after citing the Prophet’s words, “Do not precede me in standing, for I have grown heavier,” remarked: “This indicates that he performed it for that reason; consequently, it is only legislated for someone who finds himself in a comparable state.” End quote.

From what has been mentioned it is understood that the reliance forbidden in the ḥadith of Ibn ʿUmar—may Allah be pleased with him—is the form that imitates a camel when it kneels or when it rises. By contrast, the ḥadith of Mālik ibn al-Ḥuwayrith—may Allah be pleased with him—describes placing the hands on the ground level with the sides, not in front of the body. That reliance is one category, and the reliance referred to in the ḥadith of Ibn ʿUmar is another; hence, there is no contradiction between the two reports. Allah knows best.