The Buddha spent 19 rainy seasons at Jetavana monastery. Jetavana, or Jeta’s Grove, stood near Sāvatthī in the ancient kingdom of Kosala and became the Buddha’s most frequently used residence.
The rainy-season retreat, known as vassa, was a roughly three-month period when Buddhist monastics stayed in one place rather than travelling. The practice suited the South Asian monsoon, when journeys could damage crops and harm small creatures on flooded paths. Jetavana therefore became a major centre for teaching, meditation, and communal life.
The wealthy merchant Anāthapiṇḍika purchased Prince Jeta’s grove and donated it to the Buddha and the Sangha. The monastery included the Buddha’s residence, the Gandhakuṭi, and facilities for large numbers of monks. Many discourses in the Pāli Canon begin by saying that the Buddha was staying at Sāvatthī in Jeta’s Grove.
The number 19 refers to rainy-season residences, not necessarily nineteen uninterrupted years. Traditional accounts commonly state that the Buddha spent 19 of his 45 rainy retreats at Jetavana, more than at any other monastery. Some secondary retellings give different totals, but 19 is the standard answer in this context.