Meaning
The two prostrations of forgetfulness made to compensate for an error or omission committed during ritual prayer.
Literally: prostration of error
See it in the verse
Sajda-e-Sahv in Iqbal’s couplets
Main jo sar-ba-sajda hua kabhi to zameen se aane lagi sada
Tera dil to hai sanam-aashna tujhe kya milega namaz mein
Tera dil to hai sanam-aashna tujhe kya milega namaz mein
Whenever I bowed my head in prostration, a voice rose from the earth: your heart is in love with idols — what will you gain from prayer?
Self-Knowledge · Humility
Ye ek sajda jise tu garaan samajhta hai
Hazaar sajdon se deta hai aadmi ko nijaat
Hazaar sajdon se deta hai aadmi ko nijaat
This one act of devotion, which you find so heavy to make — it frees a person from a thousand servile bowings.
Freedom · Selfhood