How did the Israelites change the words they were commanded to say?

Imām Ibn al-Jawzī (d. 597/1201) summarized the scholars' opinions in his book "Zād al-Masīr" as follows:

1. Instead of "ḥiṭṭah", they said "ḥabbah fī shaʿrah" ("a grain in a hair"). This was narrated by Abū Hurairah from the Prophet Muḥammad (ﷺ). (Bukhārī, Muslim)
2. They said "ḥinṭah" (wheat). [Ibn ʿAbbās, ʿIkrimah, Mujāhid, Wahb, Ibn Zayd]
3. They said "ḥinṭah ḥamrāʾ fīhā shaʿrah" ("red wheat with a hair in it"). [Ibn Masʿūd]
4. They said "ḥabbatu ḥinṭah mathqūbah fīhā shuʿayrah sawdāʾ" ("a grain of wheat with a hole in it containing a small hair"). [Al-Suddī]
5. They said "sumbulātā" ("red wheat"). [Abū Ṣāliḥ]* (Ed: this text has been corrected in consultation with Ibn Qutaybah's Gharīb al-Qurʾān. The phrase appears to be Syriac.)