Sforno on Exodus 3:18/ספורנו על שמות ג׳:י״ח

1ושמעו לקולך, in all that you will command them.

2אלוקי העבריים, the G’d of those who follow the teachings of Ever. (grandson of Shem)

3נקרה עלינו, at a time when we had not expected any divine prophecy, and had not asked anything of Him. He commanded us to bring offerings to satisfy His own will, not ours. [the author justifies the use of the root קרה which describes things which happen without one knowing the cause for these happenings. Ed.]