What is meant by the "remnant left by the family of Moses and the family of Aaron"?

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

1, 2. It refers to the fragments of the tablets that were broken when Moses threw them and his staff. [Ibn ʿAbbās, Qatādah, al-Suddī] ʿIkrimah stated the same but made no mention of the staff. It has been said that Moses took the ark (tābūt) for the purpose of gathering the fragments of the tablets in it.

1. It refers to the staff of Moses which was there with the sakīnah (i.e. a spirit, see the related question above). [Wahb]
2. It refers to the staff of Moses, the staff of Aaron, their garments, two tablets of the Torah, and some manna. [Abū Ṣāliḥ]
3. It refers to knowledge and the Torah. [Mujāhid, ʿAṭāʾ ibn Abī Rabāḥ]
4. It refers to the fragments of the tablets, a measure of manna in a golden basin, the staff of Moses, and his turban. [Muqātil]
5. It refers to a measure of manna and the fragments of the tablets, as related by Sufyān al-Thawrī from some scholars.
6. It refers to the staff of Moses and his sandals, also related by al-Thawrī from some scholars.
7. It refers to jihād in the path of Allah, which they were commanded to undertake. [Al-Ḍaḥḥāk]