2 verses have
once
in Edition Clear Qur'an by Talal Itani / Al-Ankaboot (The Spider)

29:13They will carry their own loads, and other loads with their own. And they will be questioned on the Day of Resurrection concerning what they used to fabricate.

29:65When they embark on a vessel, they pray to God, devoting their faith to Him; but once He has delivered them safely to land, they attribute partners to Him.