What is meant by "send ahead for yourselves"?

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

1. It means "Send ahead good deeds for yourselves". [Abū Ṣāliḥ from Ibn ʿAbbās]
2. It means to "Mention the name of Allah (Bismillah) before engaging in intercourse". [ʿAṭāʾ from Ibn ʿAbbās]
3. It means "Send ahead for yourselves by seeking offspring". [Muqātil]
4. It means "Send ahead obedience to Allah and following of His commands". [Al-Zajjāj]