Salt (milh) in purity and riba rulings

Milh is what seasons food, and it may be masculine or feminine. The lexical and legal senses coincide. ¹

The Hanafis allow ablution with water in which salt has formed, but not with water in which salt was dissolved, since the first keeps its nature. Al-Zaylai forbids ablution with salt water that freezes in summer and melts in winter, and Ibn Abidin agrees. The Malikis say a change by salt does no harm. The Shafi'is have three views on whether it removes purity, and the Hanbalis dislike it with water of salt from springs but not with mined salt. ^{1 2}

The Shafi'is and Hanbalis permit tayammum only with earth, so not with salt. The Hanafis forbid it with spring salt; for mined salt there are two reports. The Malikis allow it while the salt is in its mine. ²

Salt is one of the goods the hadith names for riba, on the saying: 'salt for salt, equal for equal'. ²