Vocabulary

ਪੈਰ ਪਾਇਆ
pair paaya

stepped in, set foot in (here: the moment the bride enters the groom's home after marriage)

verb phrase
In this song
Sanjog · Sajjan Adeeb
Verse 1
ਜਦੋਂ ਦਾ ਘਰ ਵਿੱਚ ਪੈਰ ਤੋ ਪਾਇਆ ਨੀ
jadon da ghar vicch pair to paaya ni
Since you stepped into our home