What is the rule of Allah in Tajweed?

Rules for Pronouncing 'Allah' in Tajweed

When a Dhammah (Pesh) or Fatha (Zabar) precedes the term 'Allah', it should be articulated with a Full Mouth (Tafkheem). Conversely, if a Kasrah (Zer) appears before 'Allah', it ought to be pronounced with an Empty Mouth (Tarqeeq). Additionally, the rules of Saakin or Jazam, along with Qalqalah, apply in these instances.