Is i'qa' a recommended practice (sunnah) or obligatory?

Question : He sat himself down, becoming like a foot. Is it a sunnah or a mistake?

Answer : I mean, is i'qa' a sunnah? In Sahih Muslim, it is narrated from Ibn Abbas that he said it is the sunnah. But it appears to me, and Allah knows best, that this sunnah was abrogated by iftirash, and that Ibn Abbas was relying on a previous practice. Because... Yes, and this is similar to the hadith of Ibn Mas'ud (may Allah be pleased with him) regarding the application of the hands during ruku'. That is, he would place his hands in front of him and put them between his thighs, and this was abrogated, and the sunnah became placing the hands on the knees. Likewise, when they were a group of three, Abu Mas'ud (may Allah be pleased with him) would stand between the two and not move forward, and this had been abrogated, but Ibn Mas'ud did not know about it.
It appears, and Allah knows best, that the hadith of Ibn Abbas was before the prescription of iftirash, so iftirash is the sunnah. Yes.