Is the prayer of one who prostrates and whose feet touch the ground, with one or two toes inadvertently raised, valid? And is the prayer of one who prostrated with his knees on the ground, some of which were on a metal bar, valid?

Prostration is required on the seven limbs, and the majority of scholars believe that prostrating on these limbs is recommended, not obligatory. Whoever prostrates on one toe of their foot has fulfilled the command, because the hadith (definition) did not specify the entire limb. The questioner's prayer is valid, even according to those who hold that prostrating on the seven limbs is obligatory. The prayer is also valid if one places part of their knee on iron or anything else during prostration, and it is not obligatory for the prayer rug to be directly touched by the feet and knees, by consensus.